Answer:
Ice Ages
Explanation:
Observation of Diffusion Rate in Relation to Cell Size
As you have observed, cells are small. Consider your little toe: it is made of about 2-3 billion
cells! A newly-made cell will grow, but once it reaches a certain size it will divide to form two
new cells rather than growing bigger. Why is this? Why aren't you made of a few dozen, or a
few hundred cells, instead of trillions? Why don't single-celled organisms like amoebas and paramecia grow
as big as a human? In this lab, we will investigate this question using model cells.
Explanation:
new cells rather than growing bigger. Why is this ?
There are two main reasons why cells divide rather than continuing to grow larger and larger: ... If the cell grows too large, it will have trouble moving enough nutrients and wastes across the cell membrane. Cell Division. Cell division is the process by which cellular material is divided between two new daughter cells.
Why aren't you made of a few dozen, or a
few hundred cells, instead of trillions?
if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume. When this happens, the cell must divide into smaller cells with favorable surface area/volume ratios, or cease to function. That is why cells are so small.
Why don't single-celled organisms like amoebas and paramecia grow
as big as a human? again The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Thus, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume.
i belive this is just the introduction to the project but here
Frogs have 13 pairs of chromosomes. Complete this model by writing in the correct number of chromosomes for the sperm, egg, and fertilized egg of a frog. Then write in the type of cell division taking place in the two phases shown in the model.
Answer:
Explanation:+13 chromosome from sperm +13 chromosome from egg equals 26 chromosomes for fertilized egg Cell division for growth is mitosis.
Explanation:
Cells divide at different rates. Skin cells divide __________. Liver cells divide ____________. Bone marrow, stomach and intestine lining cells divide _____________.
a. never, continuously, sometimes
b. very often, sometimes, continuously
c. continuously, sometimes, never
d. sometimes, never, continuously
Question 2
What are the 2 key molecules that control and coordinate the cell cycle?
a. DNA and RNA
b. CDK and Cyclin
c. Cyclin and mitochondria
d. Apoptosis and CDK
Question 3
A cell dies and the cell next to it enters G1 phase. Which activity would happen next?
a. Chromosome duplication
b. Cell destruction
c. Cell growth
d. Chromosome separation
Question 4
At the end of G1 in Checkpoint 1, what 2 things are checked in order for the cell to proceed into the S phase1?
a. cell growth and DNA check
b. cell growth and chromosome duplication
c. cell division and DNA check
d. cell growth and cell division
Question 5
At the end of S phase in Checkpoint 2, what 2 things are checked in order for the cell to proceed into the G2 phase?
a. chromosome duplication and cell division
b. cell growth and chromosome duplication
c. cell division and DNA check
d. cell growth and cell division
Question 6
At the beginning of mitosis in Checkpoint 2, what is checked in order for the cell to proceed mitosis?
a
cell growth
b
cell division
c
chromosomes are attached to spindles
d
chromosome duplication
Question 7
What happens when the cell “supervisors” CDK and Cyclins do not work correctly?
a
The cell can become cancerous.
b
The cell is completley normal.
c
Damaged cells are destroyed.
d
The damage in the cell is repaired.
Question 8
Which of these must occur during S phase of the cell cycle so that two daughter cells can be produced during M phase?
a
The DNA must be replicated.
b
The cell membrane must be expanded.
c
The cytoplasm must be separated.
d
The chromosomes must be joined.
Question 9
This final process of cellular division where the cytoplasm is divided into two cells is called
a
Cytokinesis
b
Meiosis
c
Mitosis
d
Interphase
Question 10
Which of the following activities occurs in between the two gap phases (G1 and G2)?
a
Replication of DNA
b
Growth of the cell
c
formation of mitotic spindle
d
breakdown of nuclear membrane
Question 11
If a dog (canis familiaris) has 78 chromosomes in each of its body cells, how many chromosomes will be in each daughter cell after mitosis?
a
78
b
39
c
26
d
156
Question 12
The stages of mitosis occur in which of the following orders?
a
A-P-M-T
b
T-A-M-P
c
P-M-A-T
d
M-T-P-A
Question 13
Before DNA can replicate the DNA molecule separates into two strands, which are then used to construct 2 identical strands of DNA. This process ensures that the
a
parent cells use little ATP
b
mitochondria are genetically identical to chloroplasts
c
cytoplasm is in equillibrium
d
daughter cells are genetically identical to parent cells
Question 14
Which of the following organelles organizes the movement of chromosomes during mitosis?
a
endoplasmic reticulum
b
lysosome
c
centriole
d
peroxisome
Question 15
G1 Phase, S Phase, and G2 Phase are all parts of -
a
Mitosis
b
Interphase
c
Cytokinesis
d
Telophase
Answer:
umm sorry umm i just forgot what was the answer
Explanation:
What can we NOT learn from the fossils found in rock strata?
A. when a species became extinct
B. the exact age of each individual fossil
C. the diversity of organisms at a certain location or during a certain time period
D. how a type of organism has changed over time
Answer: C
Explanation:
Why is it important to warm up your muscles before a work out
Answer:
So you don't pull a muscle
Explanation:
boo ya
The cell theory applies to all organisms, including the five shown below. Which of the following statements describes how these organisms are an example of the cell theory? A. The organisms have cells that lack a nucleus. B. The organisms are made of one or more cells. C. The cells of the organisms undergo photosynthesis. D. The cells of the organisms are identical to each other.
Answer:
Its B
Explanation:
ALl of the cells are made from cells so that is the answer hope this helps :)
Which statement describes the relationship between plants, animals, and the carbon cycle?
O Plants use carbon and release oxygen, and animals release carbon and use oxygen.
O Animals fix carbon and release oxygen, and plants release carbon and use oxygen.
Animals fix carbon through respiration, and plants fix carbon through photosynthesis.
Plants use carbon when they decompose, and animals release carbon when they decompose.
Answer:
Plants use carbon and release oxygen, and animals release carbon and use oxygen.
Explanation:
The statement that accurately describes the relationship between plants, animals, and the carbon cycle is:
Plants use carbon and release oxygen, and animals release carbon and use oxygen.
Why do plants use carbon and release oxygen?Plants play a crucial role in the carbon cycle through the process of photosynthesis. They absorb carbon dioxide (CO2) from the atmosphere and use it, along with sunlight and water, to produce carbohydrates and release oxygen as a byproduct. This process helps to remove carbon from the atmosphere and convert it into organic compounds.
On the other hand, animals (including humans) obtain energy by consuming plants or other animals. During respiration, animals take in oxygen and release carbon dioxide as a waste product. This carbon dioxide is then released back into the atmosphere, where it can be used by plants for photosynthesis.
Therefore, plants contribute to the reduction of atmospheric carbon dioxide levels by using carbon during photosynthesis and releasing oxygen, while animals contribute to the carbon cycle by releasing carbon dioxide during respiration and utilizing oxygen.
For more details regarding plants, visit:
https://brainly.com/question/21771216
#SPJ5
What is one way that Earth's ocean currents help regulate global climate?
A.
by creating an uneven distribution of the Sun's energy across Earth's surface
B.
by moving warm water and precipitation from the Equator toward the poles
C.
by carrying cold water and floating ice from the Equator toward the poles
D.
by transmitting sunlight from the ocean surface to the ocean floor
By moving warm water and precipitation from the equator to the poles and cold water from the poles back to the tropics, ocean currents function much like a conveyor belt, hence option B is correct.
What are Earth's ocean currents?Global climate is regulated by ocean currents, which also assist to balance out the unequal distribution of solar energy hitting Earth's surface.
Sunlight energy is absorbed and stored by the ocean, which controls the temperature of the Earth's atmosphere. More than half of the solar energy that reaches Earth's surface is absorbed by the ocean, which both absorbs and releases heat more slowly than land.
By moving warm water and precipitation from the equator to the poles and cold water Global climate is regulated by currents, which assist balance out the unequal distribution of solar energy that reaches the surface of the Earth.
Therefore, by moving warm water and precipitation from the equator to the poles and cold water from the poles back to the tropics, hence option B is correct.
Learn more about ocean currents, here:
https://brainly.com/question/456463
#SPJ6
What is now done to wastewater that was not done until more recently?
I believe it is the treatment for dangerous pollutants exiting our waterways into the ocean.
Which of the following is an example of phagocytosis? : A cell takes in large amounts of water. A cell in the thyroid gland secretes a product to the outside. the sodium-potassium pump uses ATP energy to move ions. An amoeba wraps its membrane around a small unicellular organism to eat it.
Answer:
An amoeba wraps its membrane around a small unicellular organism to eat it.
Explanation:
what is gene?denfine gene
Answer:
Gene- Segments of DNA that are the basic unit of heredity in organisms and are transferred from parent to offspring.
Explanation:
:)
Answer:
gene
Explanation:
In biology, A gene is the basic physical and functional unit of heredity. Genes are made up of DNA and each chromosome contains many genes.
hope it helps!
Which of the following would require active transport?
-moving molecules across a membrane from low concentration to high concentration
-transporting materials against the concentration gradient
-during endocytosis
-all answers are correct
Explanation:
In a DNA molecule the amount of adenine is equal to the amount of ....
PLEASE HELP ASAP NEED ANSWERS
Answer:
b
Explanation:
giving brainliest!
How would an organism most likely respond to extremely cold temperatures? (4 points)
A. Blood vessels would constrict to reduce heat loss through negative feedback.
B. Blood vessels would dilate to transfer heat to more areas of the body through positive feedback.
C. Cold receptors would signal the body to retain heat through positive feedback.
D. As the organism uses energy, body temperature would decrease through negative feedback.
Explanation:
the answer is A..........
An organism most likely would respond to an extremely cold temperature as the blood vessels would constrict to reduce the heat loss through the negative feedback. Thus, the correct option is A.
How does an organism adapt to cold temperature?Adaptations are the changes in the body of a living organism which help them to survive better in a particular set of environmental condition such as hot temperature, cold temperature, etc.
In cold temperature, Shivering is an adaptation in which the nerve impulses are sent by the hypothalamus of the brain to the skeletal muscles to bring about rapid contractions which generate heat and this helps the body in staying warm. Shivering therefore helps an organism in raising the body temperature. Increase in the metabolic rate, the liver produces extra amount of heat in order to raise the temperature of the body.
An organism most likely respond to cold temperature as the blood vessels constrict to reduce the heat loss through negative feedback.
Therefore, the correct option is A.
Learn more about Adaptations here:
https://brainly.com/question/22557205
#SPJ2
do all cells use the energy that is stored in ATP
Answer:
yes all of them cause they need transportation and respiration (cellular)
hope it helps mate
take care
mark me BRAINLIEST ❤️❤️❣️❣️❤️❤️
The epithelial tissues are so important they have the ability to ______________________ _____________________ to initiate ______________________.
Answer:
• covers the body and makes up inner lining
• protects against damage, dust, bacteria
Explanation:
Amebas are single-celled organisms that need to obtain food in order to
Fill in the missing mRNA bases sequence that corresponds to the DNA base sequence - CAC GTG GAC TGA
Fill in the missing amino acid sequence that corresponds to the DNA base sequence CAC GTG GAC TGA
Answer:
mRNA: GUG CAC CUG ACU
amino acids: VAL HIS LEU THR
Explanation:
The missing RNA base sequence to the DNA base sequence: CAC GTG GAC TGA is GUG CAC CUG ACU respectively.
The missing amino acids to the DNA base sequence CAC GTG GAC TGA is VAL HIS LEU THR respectively.
What are amino acids?Amino acids are organic compounds made up of amino and carboxylic groups.
Amino acids are the primary building blocks of protein.
There are 20 amino acids are present.
Thus, The missing RNA base sequence to the DNA base sequence: CAC GTG GAC TGA is GUG CAC CUG ACU respectively.
The missing amino acids to the DNA base sequence CAC GTG GAC TGA is VAL HIS LEU THR respectively.
Learn more about amino acids, here:
https://brainly.com/question/15823799
what stages are part of the process that animals use to get their energy
The process in which oxygen and glucose undergo a complex series of chemical reactions inside cells, releasing energy. Fermentation: The process by which cells release energy by breaking down food molecules without using oxygen
ASAP Please what is the answer to this question?
By the ways, this is not a quiz or a test. It is a benchmark review.
Answer:
C. It will decrease the percentages of almond and apple crops because lesser numbers of honey bees are available for pollination.
Explanation:
The decrease in honey bees population will affect the ecosystem by decreasing the percentages of almond and apple crops which will lead to lesser numbers of honey bees available for pollination. Almonds and apple crops rely on honey bee colonies for pollination. So, a decrease in the population of honey bees will have an adverse effect on the availability of the crops and food supply. For most variety of almonds, they do not wind pollinate but require cross-pollination in order to produce nut. Other crops that rely on honey bees are watermelon, cucumbers and cherries.
Do you believe that some people have the extrasensory perception (ESP)?
Why or why not?
which of the following statements is FALSE?
a. alleles are made when one original DNA strand experiences mutations that result in phenotypes that offer advantages
b. the DNA of two alleles must be almost identical. since the trait is the same. But the effect of the allele may be very different!
c. in humans, for every trait we can only have two alleles. but that trait can be controlled by many alleles. there are no limits on how many alleles can control a trait.
d. being diploid means that humans cannot mask the effects of recessive alleles. humans always show both alleles in their phenotypes and genotypes
e. if humans were diploid we would only have one allele per trait
Helpppp pleaseee
Answer:
d. being diploid means that humans cannot mask the effects of recessive alleles. humans always show both alleles in their phenotypes and genotypes
Explanation:
Being diploid means humans carry two sets of chromosomes. Since we have both dominant and recessive gene types, humans can mask the effect of recessive alleles since the dominant trait will be seen in the phenotype or genotype since it is a dominant gene. The effect of the recessive allele will show up only if both diploid genes are recessive.
Cytosine and Thymine are chemically this type of nitrogenous base?
A. Purine
B. Pyrimidine
C. Protein
D. Nucleotide
Answer:
D
Explanation:
Nitrogenous bases present in the DNA can be grouped into two categories: purines (Adenine (A) and Guanine (G)), and pyrimidine (Cytosine (C) and Thymine (T)). These nitrogenous bases are attached to C1' of deoxyribose through a glycosidic bond.
Which statement accurately describes the relationship between weight and
mass?
A. Weight is an object's mass multiplied by its diameter.
B. Mass is an object's weight multiplied by the amount of
gravitational force acting on that object.
C. Mass is an object's weight multiplied by its diameter.
ОО
D. Weight is an object's mass multiplied by the amount of
gravitational force acting on that object.
Answer:
C
Explanation:
90 POINTS SMART PEOPLE OF BRAINLY HELP ME ASAP!! ILLL GIVE THE CROWN THING PLEASE HElP IM BEING TIMED!!
Which is the final electron acceptor in the electron transport chain of cellular respiration?
A.) NADH
B.) FADH2
C.) oxygen
D.) carbon dioxide
Answer:
Option C) Oxygen. Is your correct answer.
Explanation:
Here's a little explanation for you so you can see and read.
Answer and Explanation:
C. Oxygen
Because, the oxygen we inhale is the final electron acceptor in the electron transport chain and allows aerobic respiration to proceed, which is the most efficient pathway for harvesting energy in the form of ATP from food molecules. So, your answer would be C. Oxygen.
Hope you found this helpful! <3
An apple farmer notices that two of his trees produce particularly sweet apples. The farmer thinks that these sweeter apples would sell very well andcould make him a lot of money. He uses a Q-tip to pollinate the flowers of the sweet apple tree with pollen from the other sweet apple tree's flowers. He then takes the seeds from the fruit that they produce and grows a new field of trees from them. Almost all of these new trees make very sweet apples like the first two trees did.
Answer:
It is a right method for making a variety.
Explanation:
This is the right method for making sweet apples variety because in apple, cross pollination occurs and for making a new variety self pollination is the best way to prevent impurities in making a new variety. Due to self pollination, the farmer gain the sweet apple variety which help them to make more money by selling these sweet apple because of its demand.
Which of the following best describes an ecosystem in a neighborhood garden?
Answer:What do biologist call an ecosystem that has reached its maximum potential? ... Darwinʼs views are no longer accepted by the scientific community. ... Which of the following best defines the ecological interaction between the honeyguide bird and the honey badger? ... Rabbits and deer eat lettuce leaves from a garden.
Explanation:
When members of a community work to preserve their unique cultural traits, they are trying to protect their __________. A. universal culture B. cultural region C. popular culture D. local culture Please select the best answer from the choices provided A B C D Mark this and return
Answer:
D. Local culture
Explanation:
hope this helps :)
In an ecosystem, which list of organisms is in the correct order from producer to top-level consumer? (20 points)
A. field mouse, grass, hawk, snake
B. snake, field mouse, hawk, grass
C. grass, field mouse, snake, hawk
D. snake, grass, field mouse, hawk
C. grass, field mouse, snake, hawk
An ecosystem consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the system through photosynthesis and is incorporated into plant tissue.
List of organisms that are in the correct order from producer to top-level consumer is C. grass, field mouse, snake, hawk.
For more information:
https://brainly.com/question/13979184?referrer=searchResults
Scientists have observed many types of tropical fish moving beyond their traditional ocean ranges into waters that have historically been more temperate. These fish compete for food with native fish, consuming much from the kelp forests and beds of sea grass. The expansion of the ranges of tropical fish was most likely caused by — *
A-global droughts that raise the salt concentration of ocean waters
B-the rising temperatures of ocean waters
C-agricultural runoff that contributes to dead zones in the ocean
D-acid rain pollution that lowers the pH of ocean waters
Answer:
Raising Temps
B
Explanation: