Sedimentary rocks and fossils are the best evolution rate that describes a fossil record from many different forms of the same organism over a long period of time.
The highly organized order in which fossils are discovered in sedimentary rock layers is known as the fossil record.
It suggests that at least 3.5 billion years ago, there were living forms on Earth.
Fossils, which also show how different species evolved, provide undeniable evidence that ancient organisms were unique from those that exist now. The comparative anatomy of modern animals and fossils make up the morphological, or anatomical, record.
what is sedimentary rocks?
Sedimentary rocks are constructed from pre-existing rocks or remains of extinct creatures. They emerge from deposits that amass on the Earth's surface. Identifiable bedding or layering is typically present in sedimentary rocks.
Therefore, Sedimentary rocks and fossils are the best evolution rate that describes a fossil record from many different forms of the same organism over a long period of time.
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a chromosome has broken, and a piece of one chromosome is translocated to a nonhomologous chromosome. this is an example of what type of chromosomal alteration?
A chromosome has broken, and a piece of one chromosome is translocated to a nonhomologous chromosome. this is an example of inversion type of chromosomal alteration.
Chromosomal aberration refers to any type of alteration in the structure and quantity of chromosomes brought on by certain anomalies during cell division. These anomalies can be broadly categorized into two categories i.e., structural aberration and numerical aberration
Again, there are four categories of structural abnormalities like as
Deletion or deficiency, Duplication, Inversion, Translocation.
Chromosomes that do not come from the same pair are referred to as non-homologous chromosomes. In non-homologous chromosomes, the form of the chromosome—that is, the length of the arms and the location of the centromere—is generally different. Therefore, meiosis does not result in the pairing of non-homologous chromosomes.
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What animal is closest to humans genetically?
Answer:
fish humans are actually the closest with fish
Chimpanzees are closest to humans genetically.
How are humans related to chimpanzees?
Ever since researchers sequenced the chimp genome in 2005, they have known that humans share about 99% of our DNA with chimpanzees, making them our closest living relatives.
Are humans and chimpanzees the same family?
Researchers generally agree that among the living animals in this group, humans are most closely related to chimpanzees, judging from comparisons of anatomy and genetics.
Thus, chimpanzees are closest to humans genetically
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What is the difference of meiosis and mitosis?
Birds are able to extract more oxygen than mammals from an equal volume of air. Which of the following statements reflects why birds are able to do so?
A. Birds have a greater surface area for diffusion because they have air sacs in addition to lungs.
B. Birds have air sacs that enable them to hold their breath for longer, thereby increasing the time for oxygen to diffuse.
C. Birds have capillaries that are in close contact with the lungs.
D. Birds don't have air mixing in their lungs; air flows in a unidirectional manner across the lung surface for increased diffusion.
Option D is correct Birds don't have air mixing in their lungs; air flows in a unidirectional manner across the lung surface for increased diffusion.
Compared to those found in the mammalian respiratory system, the air capillaries in the parabronchial system's walls have a significantly higher overall surface area. More oxygen from each breath may be exchanged for carbon dioxide from the blood and tissues thanks to the increased surface area. Human lungs are substantially less effective than those of birds at extracting oxygen from the air. This is crucial for birds because they expend a lot of energy while they fly and so require more oxygen for their cells to absorb the energy from the food they consume. Additionally, birds occasionally soar very high in the sky where there is less oxygen.
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1. The following experiment was designed to test whether different
concentration gradients affect the rate of diffusion. In this experiment,
four solutions (0% NaCl, 1% NaCl, 5% NaCl, and 10% NaCl) were
tested under identical conditions. Fifteen milliliters of 0% NaCl were put
into a bag formed of dialysis tubing that is permeable to Na, Cl, and
water. The same was done for each NaCl solution. Each bag was
submerged in a separate beaker containing 300 mL of distilled water,
The concentration of NaCl in mg/L in the water outside each bag was
measured at 40-second intervals. The results from the 5% bag are shown
in the table below.
CONCENTRATION IN mg/L OF NaCKOUTSIDE THE 5% NaCl BAG
Time
(seconds)
0
40
80
120
160
amacią na
onmidniem smast
NaCl
(mg/L)
0
130
220
320
400
3.25
2.75
line grapn
Label
Scale
2.5
2.5 so hogyxO S
8 ni abigil
a. On the axes provided, graph the data for the 5% NaCl solution
stqxa
b. Using the same set of axes, draw and label three additional lines
representing the results that you would predict for the 0% NaCl,
10% NaCl, and 10% NaCl solutions. Explain your predictions
c. Use the Graph to calculate the mean rate of diffusion for the 5%
solution. Give your answer to the nearest whole number.
tite
Label the axes on the graph. The 0% line is flat; because there is no NaCl, the rate does not change. 1% is less than 5%, and because there is less NaCl in the solution, the rate is substantially smaller. There is much more NaCl in the solution when the 10% line is above the 5% line. If plant cells are exposed to seawater, the salt content of the seawater is higher than that of the contents of the cell, and the water content of the cell is more elevated.
The 0% line is flat and the rate stays the same because there is no NaCl. The rate is significantly lower at 1%, which is less than 5% because there is less NaCl in the solution. The 10% line is above the 5% line, indicating much more sodium chloride in the solution.
If plant cells are exposed to saltwater, the salt concentration in the seawater is higher than that in the cell's contents, and the cell's concentration of water is higher. Osmosis, or the process of water moving from a region of higher concentration (within the cell) to a region of lower concentration (outside the cell), will take place, and the contents of the cell will contract or dehydrate. The cells will eventually pass away if this keeps happening. The differential in water content between the interior and outside of cells is known as water potential.
Consequently, we can conclude that when plant cells become exposed to seawater, the salt concentration of the seawater is more than the contents of the cell and the cell's water content is higher.
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13. Basically the Federal Reserve increases or decreases the ___to change___
In order to adjust the reserves that will modify the money quantity in the economy, the Federal Reserve raises or lowers the discount rate.
By reducing the reserve requirements for the banks, the Fed could expand the money supply by enabling banks to make more loans. The Fed can reduce the amount of money in circulation by increasing the reserve requirements for banks, on the other hand.
A single bank may issue loans up with the number of its surplus reserves, generating an equal number of deposits, if such Federal Reserve raises reserves. However, the financial system is capable of numerous expansions of deposits.
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Which statement describes the effects of farming practices such as the overuse of irrigation water?
A. More areas have polluted soil, reducing crop variety.
B. More areas have polluted soil, increasing crop variety.
C. Fewer areas have polluted soil, increasing crop variety.
D. Fewer areas have polluted soil, reducing crop variety.
More areas have polluted soil, reducing crop variety is the statement which describes the effects of farming practices such as the overuse of irrigation water.
what is the composition of soil?In a technical sense, the soil is a combination of minerals, organic substances, and living things. However, soil is a general term that refers to any loose material. Additionally, there are numerous soil varieties that are found all over the world. These are typically divided into the following groups: Pottery Soil, Sandy ground, Muddy Soil , Sludge Soil.
By the weathering of rocks, soil is created. One of the three ways that solid rock can wear away into the earth is as follows: Weathering by machine, Weathering by Chemical, Bioclimatic Change.
The soil typically contains 45% minerals, 50% voids or empty spaces, and 5% organic material. In addition, soil serves a variety of vital purposes, including
providing the plants with a growing medium
one of the most important elements of the biosphere acts as a modulator of the earth's atmosphere
habitat for living things.
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The production of new molecules and the breakdown of old molecules in the cell is called:_______.
The production of new molecule and the breakdown of old molecules in the cell is called metabolism.
what is metabolism?
the chemical processes that occur within a living organism in order to maintain life.
B-complex vitamins: These help metabolize carbohydrates, fats, and proteins, activating stored energy instead of letting it turn to fat. Niacin, vitamin B-6, and iron: This impressive trio increases your body's production of the amino acid L-carnitine to help burn fat.
Metabolism can be conveniently divided into two categories:
Catabolism - the breakdown of molecules to obtain energy
Anabolism - the synthesis of all compounds needed by the cells
Metabolism is closely linked to nutrition and the availability of nutrients. Bioenergetics is a term that describes the biochemical or metabolic pathways by which the cell ultimately obtains energy. Energy formation is one of the vital components of metabolism.
so, formation of new molecules is called metabolism
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How many cell organelles and their functions?
Answer:
three.
nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins
Explanation:
energy production, building proteins and secretions, destroying toxins, and responding to external signals.
There are all total 10 cell organelles in a cell
What is a cell organelle?
Cell organelles are the cellular constituents. These cell organelles, which are found in the cells and differ in their forms and functions, include both membrane-bound and non-membrane-bound organelles. For the cell to function normally, they coordinate and work effectively. Some of them work by giving shape and support, while others are involved in a cell's movement and reproduction. The cell contains a variety of organelles that are divided into three groups based on whether or not they have a membrane.Function of cell organelles:
1. Plasma Membrane
The terms cell membrane and cytoplasmic membrane are also used to describe the plasma membrane. A lipid bilayer and proteins make up the cell membrane, which is selectively permeable.2. Cytoplasm
Animal and plant cells both include cytoplasm. Between the cell membrane and the nucleus, these are jelly-like substances. They are primarily made of water, organic compounds, and inorganic substances.3. Nucleus
Every eukaryotic cell has a double-membraned organelle called the nucleus. It is the largest organelle and serves as the command center for cellular operations as well as the DNA repository for the cell. The nucleus is a dark, spherical structure that is encircled by a nuclear membrane. It is a membrane with pores.4. Endo plasmic Reticulum:
The Endoplasmic Reticulum is a network of fluid-filled membranous tubes. They are the cell's transport system and are responsible for moving materials around the cell.Endoplasmic reticulum comes in two varieties:The production of proteins is carried out by the rough endoplasmic reticulum, which is made up of cisternae, tubules, and vesicles.Smooth Endoplasmic Reticulum: This organelle serves as a storage area and is involved in the synthesis of lipids and steroids, as well as the detoxification of the cell.5. Plastids
Large, membrane-bound organelles called plastids hold pigments. There are three sorts of plastids, each based on the type of pigments.Chloroplasts: Responsible for trapping lightLeucoplast: Color less plastids; Used for storageChromoplasts: Provide particular color to the plant6. Ribosomes:
These are present in association with endo plasmic reticulumresponsible for protein synthesis.7. Golgi Apparatus:
Proteins and lipids are predominantly moved, altered, and packaged by this cellular organelle to reach specific locations. Both plant and animal cells contain the Golgi apparatus, which is located in the cytoplasm of a cell.8. Microbodies:
Microbodies, which can be found in both plant and animal cells, are tiny, membrane-bound vesicular organelles. Only under an electron microscope can you see them because they are filled with different enzymes and proteins.9. Cilia and Flagella:
Small, hair-like protrusions called cilia are found outside of cell walls and act as oars to propel either the cell or the extracellular fluid. The slightly larger flagella are in charge of cell movement.10. Vacuoles:
Vacuoles are typically described as irregularly shaped storage bubbles that are present in cells. They are membrane-enclosed organelles that contain fluid.Therefore these are the cell organelles with their functions
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You wish to investigate how exercise affects the rate of cellular respiration. You decide to squeeze a ball for 5 minutes and around 3 minutes you begin to experience a burning sensation and fatigue. This means your muscles are beginning to run out of oxygen. What process is causing the burning in your muscles?
During an exercise, the process that is causing the burning in your muscles is the production of lactic acid in anaerobic respiration.
What is the effect of exercise on cellular respiration?Exercise refers to any activity that involves planned, structured, and repetitive bodily movements that are performed in order to maintain or improve the physical fitness of the body.
During exercise, the rate of cellular respiration increases, and similarly the rate of breathing increases.
At a point during the exercise, where the rate of oxygen consumption by the muscles exceeds the rate at which it is replenished during breathing, the cells of the muscles switch from aerobic respiration to anaerobic respiration.
During anaerobic respiration in the muscle cells, lactic acid is produced. The production of lactic acid in the muscles results in a burning sensation in the muscles as well as producing feelings of fatigue.
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A
B
Which type of bacteria develop
resistance more easily and are
more harmful to humans, in
general?
Gram-negative bacteria this
Gram-positive bacteria
Answer:
a) Gram-negative bacteria
Explanation:
Gram-negative bacteria develop resistance more easily and are more harmful to humans than that of Gram-positive bacteria. Hence, the option (a) is the correct answer.
Answer: Gram-negative bacteria
Explanation:
1. Show the possible gametes for the following:
a) WW
b) BBCc
d) SsTt
e) EeFfGg
c) Ll
As per Mendel, the genes are making alleles, where the y segregate before expressing. The law of segregation means they segregate that too independently.
What is allele ?
An allele is defined as the pair of contrasting characters carrying genes present together and the unit is called allele.
WW having the genotype will form gametes as W,W.
BBCc will form the gametes as BC, Bc.
EeFfGg will form the gametes as EFG, efg, Efg, eFg, efG, EFg, efG.
LI will form gametes as L,I.
The gametes on pairing with the mating partner will form the upwritten gametes.
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Enzymes affect the reactions in living cells by changing the:_______.
Enzymes affect the reactions in living cells by lowering the activation energy of the reaction.
What are enzymes?
Discussion of substrates, active sites, induced fit, and activation energy in relation to the role of enzymes as catalysts for processes in biological systems.
What is activation energy?
Even exergonic (energy-releasing) reactions need some energy input to start before they can move on to their energy-releasing phases. The activation energy is the initial energy input that is later repaid as the reaction progresses.The bare minimum additional energy needed by a reactive molecule to transform into a product is known as activation energy. It is also known as the minimal energy required to energize or activate molecules or atoms in order for them to engage in a chemical reaction or transformation.Hence enzymes affect the reactions in living cells by changing the activation energy.
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difference of collective intelligence and group intelligence
Explanation:
Collective intelligence is the process by which a large group of individuals gather and share their knowledge, data and skills for the purpose of solving societal issues while.
Which type lf neuron is found the Greatest amounts in the nervous system
Answer:
Multipolar neurons
Explanation:
The most abundant cells in the brain
sculptor wanted to build a monument that would last for centuries, which combination of materials would she
want to use?
O one solid piece of granite to minimize surface area
O one solid piece of limestone to minimize surface area
O bricks of granite to maximize surface area
O bricks of limestone to maximize surface area
4
One solid piece of granite to minimize the surface area is used to build a building that would last for centuries.
What is Granite?
Granite is type of rock, an ingenious rock that is used most commonly in the mountainous areas.It is usually used to make countertops, kitchen counters, floor tiles, cemetery monuments, etc.Granite is mined in the different parts of the world but there only a few specific countries that mines most exotic granite colors in countries such as, India, China, Brazil, Finland and South Africa.Imperial Red Granite is said to be one of the most exotic Granite available. It comes with exotic mix of colors in grainy form texture.To learn more about Granite, check this link:
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2.04 Cell Transport Lab Report biology
Evaluate the lab and data collected. What type of transport occurred in this lab? Explain your answer, including evidence from your experiment to support your explanation.
The lab and the data gathered are required to determine the type of transit that took place. Since they are not there, a description of the various methods of transportation will be presented.
Cell TransportDiverse types of transporters allow different substances to move through the cell membrane, including water, proteins, ions, and molecules of various sizes. Each molecule's transport strategy is influenced by its concentration, size, and polarity.
The two categories of transportation are active and passive.
Since active transport works against the concentration gradient, it requires energy to move molecules. This group consists of;
Simple diffusion ; is the movement of tiny molecules from one side of the membrane to the other as a result of the concentration difference.
Osmosis: Water moves through a membrane from one area with few molecules to one with many molecules. Water flows within or outside of the cell to balance the solute concentration on either side of the membrane.
Proteins are used in a process known as "facilitated diffusion" to move big molecules, ions, or hydrophobic compounds from one side to the other. In this sort of transport, we have carrier proteins that attach to a particular molecule, change its shape, and transport the molecule, as well as proteins that construct channels to allow those hydrophobic molecules to pass through the lipid membrane.
Since active transport works against the concentration gradient, it requires energy to move molecules. Using ATP, the sodium-potassium pump transports sodium outside the cell and potassium inside. With this transport, the ions travel to the areas with the highest concentration.
In conclusion, different types of transport exist; they rely on the molecule's type or concentration ,examine the experiment's components and determine which of these transports might be present to determine what mode of transport took place in the lab.
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Please help. I need this now.
When Mendel was doing his dihybrid cross experiment, he looked at 2 traits (seed color and shape) as opposed to his monohybrid cross, where he looked at 1 trait (flower color). What was Mendel able to illustrate by doing this experiment?
WILL GIVE 5 AND BRAINLIEST
Answer:
Dihybrid Cross In a dihybrid cross experiment, Mendel considered two traits, each having two alleles. He crossed wrinkled-green seed and round-yellow seeds and observed that all the first generation progeny were round-yellow.
Explanation:
Have a blessed day =)
Answer:
Explanation:
I am not sure
What are some example of an animal organs? Plant organs?
Animals have organs including the stomach, liver, lungs, and heart. Plants have two different kinds of organs: stems and leaves. Organ systems are collections of organs in higher organisms.
Organ systems are a set of organs working together to maintain good biological performance; organisms are living creatures generated by an ordered collection of systems. Organs are a group of tissues that come together to form a complex structure with a special function. The vegetative and reproductive organs of plants can be distinguished. The root, stem, and leaf are vegetative plant parts, whereas the flower, seed, and fruit are reproductive. The reproductive organs are necessary for reproduction, but the vegetative organs are crucial for sustaining a plant's existence (they carry out key tasks like photosynthesis).
In light of this, we may affirm that animals have organs such as the stomach, liver, lungs, and heart. Both stems and leaves are various types of organs in plants.
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What Will Life Look Like as MAJOR Rivers Run Dry?
Teddy has the no antigen on his erythrocytes. What blood e type does he have? Which antibodies does he likely have in her bloodstream? Who can he donate to? Who can he receive from?
Answer:
Teddy has blood group O
He has both anti-A and anti-B antibodies.
It doesn't mention whether he has the rhesus positive or negative factor so I'll generally say he can donate to all blood groups.
He can only receive from another O blood group
Which of these is an example of negative feedback?
1. As a blood clot begins to form, the process of its formation gets faster and faster.
2. After you eat, glucagon stimulates an increase in blood sugar levels.
3. After you eat, insulin stimulates the lowering of blood sugar levels.
4. The digestive enzyme pepsinogen is converted to pepsin by the action of hydrochloric acid; pepsin itself can then convert pepsinogen into pepsin.
5. Once labor begins, contractions increase in frequency and intensity.
After you eat, insulin stimulates the lowering of blood sugar levels is an example of negative feedback
Blood sugar levels are raised after eating, and insulin causes them to fall. In this case, the stimulus is countered by the response (raised blood sugar levels) (by lowering blood sugar levels). A negative feedback mechanism, often referred to as negative feedback homeostasis, is a system that is activated by an output deviation and results in output changes that are the exact opposite of the deviation that caused it.
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The cell membrane:
allows some substances to pass into and out of the cell
prevents all substances from passing into and out of the cell
is composed of a protein bilayer
is composed of a lipid bilayer
The cell membrane allows some substances to pass into and out of the cell and it is composed of a lipid bilayer (Options 1 and 4).
What is the cell membrane?The cell membrane is a bilayer mainly composed of phospholipids which act as a selectively permeable barrier for the entry of certain substances to the cell depending on the concentration of these substances.
Therefore, with this data, we can see that the cell membrane is a lipid bilayer that allows the selective movement of solutes across the membrane (i.e. in and out of the cell).
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if you were trying to get people to try your product (protein) how would you promote it?
NEED HELP ASAP.
If you were trying to get people to try your product (protein), you could promote it by highlighting its benefits, such as its ability to help build muscle, or by offering discounts or samples.
What is protein?
Large biomolecules as well as macromolecules known as proteins are made up of one or more extended chains of amino acid residues. Among the many tasks that proteins carry out in living things are catalysing metabolic processes, replicating DNA, reacting to stimuli, giving cells and organisms structure, and moving molecules from one place to another. The primary way that proteins differ from one another is in the order of their amino acids, which is determined by the nucleotide sequence of their genes and typically causes a protein to fold into a particular 3D structure that controls its activity.
A polypeptide is an ordered sequence of amino acid residues. At least one lengthy polypeptide is present in every protein. Less than 20–30 residue polypeptides are frequently referred to as peptides and are rarely thought of as proteins.
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Which is TRUE of Gram-
negative bacteria?
A. causes sickness like strep throat and
staph infections
B. stains pink from safranin this
C. less threatening and easily killed
with antibiotics
D. a thick cell wall of peptidoglycan
Answer:
I'm 90 percent sure it's D
Noah developed a model of how genes are acquired by offspring in sexual reproduction. He used two baskets-one to represent each parent. He placed two slips of paper representing alleles into each basket. To show the transmission of alleles, he selected one of the baskets, and took both slips of paper from that basket to represent the alleles passed to the offspring. Evaluate Noah's model. Identify whether Noah's model is incorrect or correct, and justify your response. Then, identify any changes that should be made to the model.
The process of creating new organisms through sexual reproduction involves fusing the genetic material of two individuals of different sexes.
What is sexual reproduction?The gametes, which are specialized sex cells, have chromosomes in their nuclei that contain the genetic information. These gametes are known as sperm in males and eggs in females, respectively.
The two gametes combine during sexual reproduction in a process known as fertilization to form a zygote, the predecessor to an embryo offspring, which receives half of its DNA from each of its parents.
A zygote in a person has 46 chromosomes total, 23 from the mother and 23 from the father. These chromosomes come together to create an offspring that resembles both its parents.
Therefore, The process of creating new organisms through sexual reproduction involves fusing the genetic material of two individuals of different sexes.
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1.
The cell membrane:
allows some substances to pass into and out of the cell
prevents all substances from passing into and out of the cell
is composed of a protein bilayer
is composed of a lipid bilayer
2.
When a human red blood cell is placed in a hypotonic environment, it will:
shrink (get smaller)
swell (get bigger)
stay the same
none of the above
3.
Exocytosis is a:
mechanism by which cells ingest other cells
transport process in which vesicles are formed from pouches in the cell membrane
a way for cells to release large molecules and wastes
none of the above
4.
How are cell membrane’s best described? (READ choices carefully!)
a double layer of phospholipid molecules with hydrophobic tails directed towards the cytoplasm of the cell
a single layer of phospholipid molecules with water molecules attached along one side
a double layer of phospholipid molecules with hydrophilic heads directed towards each other.
A double layer of phospholipid molecules with hydrophobic tails oriented towards each other.
5.
For diffusion to occur, there must be:
a gradient
energy
ATP
water
6.
In reference to diffusion, “passive” really means:
energy IS required
without a membrane
energy is NOT required
in the air
7.
Solutes (like salt) assisted by a carrier or peripheral protein may cross a semipermeable membrane by which process?
facilitated diffusion
osmosis
simple diffusion
endocytosis
8.
The diffusion of water molecules across a semipermeable membrane is termed:
simple diffusion
facilitated diffusion
hydrolysis
osmosis
9.
If a red blood cell is taken from the body and placed in a hypertonic solution, what happens to the cells?
The cell swells (gets bigger) and burst because water is moving into the cell
The cell shrivels up (gets smaller) because water is leaving the cell
The cell remains unchanged due to equal solute concentrations inside and outside the cell
They become white blood cells
10.
What is active transport?
diffusion of molecules within a cell
movement of molecules into or out of a cell against a concentration gradient
movement of molecules into or out of a cell down a concentration gradient
rapid movement of molecules in solution
11.
A cell is placed in an isotonic solution. Which statement is TRUE about water movement?
net water movement will be into the cell because there is more water outside than inside
net movement will be out of the cell because there is more solutes outside the cell
no water will move into or out of the cell
water will move into and out of the cell at equal rates
12.
Solutions that cause water to enter cells by osmosis are termed:
isotonic
hypertonic
hypotonic
homeostasis
13.
What does a cell use exocytosis for?
to move away from danger
to release or remove substances from the cell
to bring nutrients in
to create new cells
14.
A cell controls what enters and leaves itself in order to maintain:
communication with other cells
move through its environment
create new cells
homeostasis
15.
During the “egg lab” what happened to the egg after we let it sit in vinegar for a day?
the egg became cooked
the egg broke into pieces
the shell was removed
syrup went into the egg
16.
During the “egg lab”, what happened after the egg sat in water overnight?
the egg got bigger
the shell was removed
the egg shrunk
there was more water in the cup
17.
During the “egg lab”, what happened after the egg sat in syrup overnight?
the syrup got runny (more watery)
the egg lost mass
the egg gained mass
both A and B
18.
The “water loving” portion of the cell membrane:
contains the lipids
contains the phosphates
contains the "tails"
none of these
19.
The “water fearing” portion of the cell membrane:
contains the lipids
contains the phosphates
contains the "heads"
none of these
20.
A ___________ is the difference between the concentration of a particular molecule in one area and the concentration in an adjacent area.
semipermeable membrane
bulk transport
osmosis
concentration gradient
21.
The cell membrane is described as a fluid mosaic. It is said to be a mosaic because:
individual phosphates and proteins can move freely
because of the pattern produced by the scattered proteins
because of the “water fearing” ends
because of the “water loving” ends
22.
Look at the picture below, in which direction will diffusion take place?
solutes will move into the cell
solutes will move out of the cell
water will not move
water will move out of cell
HELP TEST
The correct descriptions and options are as follows;
The cell membrane allows some substances to pass into and out of the cell; option AWhen a human red blood cell is placed in a hypotonic environment, it will swell (get bigger); option BExocytosis is a way for cells to release large molecules and wastes; option CThe cell membrane is a double layer of phospholipid molecules with hydrophobic tails oriented towards each other; option DFor diffusion to occur, there must be a gradient; option AIn reference to diffusion, “passive” really means energy is NOT required; option C.Solutes (like salt) assisted by a carrier or peripheral protein may cross a semipermeable membrane by facilitated diffusion; option AThe diffusion of water molecules across a semipermeable membrane is termed osmosis; option DIf a red blood cell is taken from the body and placed in a hypertonic solution, the cell shrivels up (gets smaller) because water is leaving the cell; option BActive transport is the movement of molecules into or out of a cell against a concentration gradient; option BA cell is placed in an isotonic solution, water will move into and out of the cell at equal rates; option DSolutions that cause water to enter cells by osmosis are termed hypotonic; option CA cell uses exocytosis to release or remove substances from the cell; option B.A cell controls what enters and leaves itself in order to maintain homeostasis; option DDuring the “egg lab” what happened to the egg after we let it sit in the vinegar for a day was that the shell was removed; option CDuring the “egg lab”, what happened after the egg sat in water overnight was that the egg got bigger; option A.During the “egg lab”, what happened after the egg sat in syrup overnight was both A and B; option C.The “water loving” portion of the cell membrane contains the phosphates; option B.The “water fearing” portion of the cell membrane contains the lipids; option A.A concentration gradient is a difference between the concentration of a particular molecule in one area and the concentration in an adjacent area; option DThe cell membrane is described as a fluid mosaic. It is said to be a mosaic because of the pattern produced by the scattered proteins; option B.Water will move out of the cell.What is the plasma membrane?The plasma membrane is a phospholipid bilayer that allows molecules to selectively move in and other of the cell by diffusion or by osmosis.
The movement of molecules is dependent on the concentration gradient as well as on the needs of the cell.
The structure of the cell membrane is defined as a fluid mosaic.
The polar head groups face in and out of the aqueous environment of the cell. The non-polar tails are projected toward each other away from water.
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1. In humans, brown eyes are usually dominant over blue eyes. Suppose a blue-eyed
man marries a brown-eyed woman whose father was blue-eyed. What proportion
of their children would you predict will have blue eyes?
Answer:
I believe about 50%
Heliotropism is a type of phototropism. Why do the leaves in sunflowers, daisies, and buttercups move with the sun?
When you revised your track, how did the law od conservation of energy lead to less kinetic energy than your first track. Be sure to mention the connection to gravitational potential energy as well. HELPP PLEASEEEE
If a person revised their track, the law of conservation of energy lead to less kinetic energy than their first track because Potential energy is transformed into kinetic energy as the person descends the track. Some of the system's energy is altered into heat energy by friction. The energy cannot be returned to the system's potential or kinetic energy once the kinetic energy has been transformed into heat.
How does the law of conservation of energy apply to kinetic and potential energy?Note that:
KE + PE = constant.
An easy illustration involves a stopped car at the summit of a hill. The car drives faster as it goes down the hill, which results in an increase in kinetic energy and a decrease in potential energy.
Therefore, According to the rule of conservation of energy, energy can only be altered from one form of energy to another and cannot be created or in any way be destroyed.
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