Answer:
A
Explanation:
Choose one biogeochemical cycle and explain.
In animal cells, the actin cytoskeleton forms a cleavage furrow to physically separate the cellular contents during cytokinesis. Explain why this approach won't work in plant cells, and describe how they do it instead.
Answer:
The approach of cytokinesis to form cleavage furrows does not work for the plant cells due to specific reasons. These reasons are -
The presence of a rigid outermost layer called cell wall in plant cells that do not allow for forming furrows.
Centrioles present in animal cells helps in maintaining the organisation of mitotic spindle and completion of cytokinesis, however, not found in plant cells. The Golgi vesicles secrets and makes a septum or cell plate in the equatorial plane of the cell wall with the help of microtubules and phragmoplast help in the separation of two daughter cells.
The process of cytokinesis to form cleavage furrows does not function for the plant cells due to the following reasons :
The existence of a tough extreme layer called cell wall in plant cells that do not allow for forming furrows.Centrioles present in animal cells help in supporting the organisation of mitotic spindle and completion of cytokinesis, however, not found in plant cells.What is a cleavage furrow It is formed when animal cells separate?Cleavage furrow is a constriction formed by the actin ring during animal-cell cytokinesis that leads to cytoplasmic division. cytokinesis is the division of the cytoplasm the following mitosis to form two daughter cells.
Thus, the presence of cell walls and the absence of centrioles are the reason.
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How does human population growth and resource use impact biodiversity?
As human populations increase, the demand for resources such as food, water, and energy also increases.
What is biodiversity?Biodiversity refers to the variety of life on Earth, including the variety of species, ecosystems, and genetic diversity within species.
Human population growth and resource use have a significant impact on biodiversity. This leads to habitat destruction, pollution, and climate change, all of which have negative impacts on biodiversity.
Habitat destruction: As human populations grow, they need more land for agriculture, settlements, and infrastructure development. Pollution: Human activities such as industrialization and transportation produce pollutants that can harm biodiversity. Climate change: Human activities such as burning fossil fuels for energy production lead to the emission of greenhouse gases, which contribute to climate change.Thus, human population growth and resource use impact biodiversity by causing habitat destruction, pollution, and climate change.
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can someone help me with this question?
Answer:
research question: how do different humidity levels affect the heights of different types of trees
independent variable: humidity level
dependent variable: tree height
constants: temperature, light, duration of time
control group: tree left outside in normal conditions
Explanation:
why a pond is considered a community and also ecosystem
Answer:
A pond is an area filled with water, either natural or artificial, that is smaller than a lake. Ponds can be created by a wide variety of natural process (. on floodplains as cut off river channels, by glacial processes, by Pearl and
formation, in coastal dune systems, by beavers) or they can simply be isolated depressions (such as a kettle hole, vernal pool, prairie pothole or
Answer:
The pond contains both. It contains things like water, rocks, mud, sand, available oxygen, temperature, pH, etc. It also contains living items like bacteria, fish, frogs, etc. That's an ecosystem.
Explanation:
What colors of light are absorbed? Which color is not absorbed?
Answer:
All colour except which is already present in the body.
Explanation:
The plant leaf has green colour so the plant absorb all the colour except green. The presence of green colour causes reflection of green colour so that's why we can see the green colour of the leaves. Every material or substance have a specific colour which can be seen when they absorb all light except the colour which is already present in it so we can say that that colour is not absorbed by the body which is already present in it.
When blood glucose levels rise, the hormone ___ is released from the ___ to convert excess glucose into glycogen, a short-term energy storage molecule for the body.
Answer:
insulin; pancreas.
Explanation:
An endocrine system refers to a series of ductless glands and organs responsible for the production and secretion of hormones that are used by the body for the performance of various functions such as metabolism, controlling growth, reproduction, mood, sleep, etc. These hormones are secreted directly into the circulatory system (blood) and then transported to the organs and tissues in the body.
Basically, the endocrine system contributes significantly to the state of homeostasis in the body.
Homeostasis can be defined as a process through which a living organism maintains a steady or stable physical, internal and chemical environment that is ideal to enhance life and proper functionality.
Generally, when the blood glucose levels of a person rise, through an endocrine system, the hormone known as insulin is released from the pancreas to convert excess glucose into glycogen, which is typically a short-term energy storage molecule for the body.
In conclusion, the endocrine system maintain homeostasis by releasing insulin from the pancreas to decrease blood sugar and releasing glucagon to increase blood sugar.
The differences in beak shape are examples of:
Answer:
BIOLOGICAL ADAPTATION
Explanation:
Bird beaks are textbook examples of BIOLOGICAL adaptation to diet, but their shapes are also controlled by genetic and developmental histories.
Answer: The first one is bacterial because it mutates very quickly compared to humans and the second one is biological adaptation
Hope it helps you if not sorry
Explanation:
eagles have specially adapted feet and talons to help them out. A series of bumps on the bottom of their feet -- known as spicules -- help them hold on to their prey during flight. They also have razor-sharp talons that they use to grab their prey, kill it and tear into.
PLEASE HELP
A student wants to compare the amounts of CO2 given off by yeast provided
with different amounts of sugar. The student places a balloon over each
container to catch the released CO2. How can the student make quantitative
observations of the CO2 collected in the balloons?
A. Describe the shape of each balloon.
B. Approximate the relative size of each balloon.
C. Measure the circumference of each balloon.
D. Count the individual CO2 molecules in each balloon.
Answer:
So others don't get confused, the answer would be Measure the circumference of each balloon
Explanation:
The student will utilize the following factors to make quantitative observations of the carbon dioxide collected in the balloons which are describing the shape of each balloon, the relative size of each balloon and measuring the circumference of each balloon.
What is Yeast?
Yeast is a type of fungus that undergo fermentation, where it converts sugar into energy and carbon dioxide is produced during the process as a byproduct.
When sugar in different amounts is provided to the yeast, the carbon dioxide concentration will also differ accordingly. More fermentation leads to more sugar production which leads to increase in level of carbon dioxide.
The shape of the balloon determines the volume of carbon dioxide produced. The amount of carbon dioxide produced in each container is compared by the relative size of each balloon and measuring the balloon circumference will help to calculate the volume of gas.
Therefore, describing the shape of each balloon, the relative size of each balloon, measuring the circumference of each balloon are very important factors to determine the carbon dioxide collected in balloons.
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Charles Darwin, Charles Lyell and Alfred Russell Wallace all contributed to the theory of
evolution. Which statement best explains how support for this theory was obtained from the
scientific community?
Group of answer choices
Each scientists dissected different species from different parts of the world, then compared and shared their findings with each other.
Many scientific observations, related to biogeography and comparative anatomy, were made, documented and shared.
Together the scientists analyzed and compared cave drawings of various species of prehistoric animals from different parts of the world.
Each scientist worked in isolation to experiment on fossils and prove their beliefs regarding evolution. Yes
They made documented and shared many scientific observations related to biogeography and comparative anatomy . So, the correct option is (C).
What is Theory of Evolution?The theory of evolution, also called the "theory of evolution by natural selection", was proposed by Charles Darwin and Alfred Russel Wallace in the nineteenth century.
Darwin further stated that species can change over time, that new species come from pre-existing species, and that all species share a common ancestor. In this theory, each species has its own distinct lineages or genetic differences that come from a common ancestor, gradually accumulating over a very long period of time.
This theory explained that birds had moved from the mainland to the islands, and that species gradually evolved to fit their new environments. Natural selection occurs because organisms in a population usually have randomly occurring gene variations and mutations that affect adaptation.
Thus, they made documented and shared many scientific observations related to biogeography and comparative anatomy . So, the correct option is (C).
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Deficiency of Vitamin K causes
A. Rickets
B. Anemia
C. Scurvy
D. Beri beri
Answer:
I believe the answer is B. Anemia
Answer:
(B) = Anemia
Explanation:
because of shortage of blood due to the inefficiency to clot blood because of the absence or deficiency of vitamin K
PLEASE HELP!!! WILL GIVE AS MANY POINTS AS POSSIBLE
What are the three types of sentences in ANY body paragraph?
Select all that apply:
Concluding Sentence
Topic Sentence
Counterclaim
Supporting Sentence
Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?
answer:
a balance and a graduated cylinder
Explanation
Density is mass per unit and it is property characteristic of a substance. The arrangement of the mass of atoms and their size is what determines the the density of a substance.
For a student to measure the density of seawater he/she is required to use a balance and a graduated cylinder where a balance will be used to measure the mass of the mineral sample and then a graduated cylinder to determine the volume.
How many water molecules are needed to break down an oligosaccharide that contains 10 glucose units?
Classify the reaction.
Answer:
It take ten units of water to break down oligosaccharide that contains 10 glucose units
What would most likely happen to a unicellular if it was exposed to a hypotonic solution for an extended period of time
trình bày cơ chế hấp thụ và chuyển hóa lipid từ đường tiêu hóa ở người?
Why are economic impacts important to consider when planning to address climate change? Wealthy people and businesses won't support changes if the changes are not beneficial to them in the short term Climate change is the most significant danger humans face in the next 100 years We only have limited resources and so should use them where they will do the most good Without substantial economic sacrifice the world will suffer significant, inextricable (cannot be undone) damage due to climate change
Answer:
The projections, if they play out, illustrate the potential magnitude of decisions such as the recent one by President Trump to walk away from the international Paris climate accord, in which more than 170 countries agreed to slash their carbon emissions in coming years. Meanwhile, hundreds of governors, mayors and other elected officials have vowed to continue the shift toward cleaner sources of energy.
Hsiang acknowledged that despite the researchers’ efforts to use sound statistical approaches and a wealth of databases, calculating the future costs of climate change is inherently uncertain. Communities are likely to adapt and become more resilient. Industries evolve and relocate.
Delavane Diaz, a senior technical leader at the Electric Power Research Institute, agreed that the study has limitations. For one, it fails to account for how humans will probably plan for and respond to the changing climate. Still, she said, the conclusions provide an important glimpse of the economic risks the United States could face as global warming worsens.
Explanation:
Help! My cat has done this 3 times. She falls over, starts kicking her leg, and biting it or biting her tail. She usually doesn’t do this! What’s wrong with her???
The ability of a person to roll his tongue is due to a dominant allele T. A woman who can roll her tongue is married to a man who cannot . Two of their four children have the ability to roll their tongues , and two do not . What are the parents genotypes ?
Mother: tt father Tt
mother Tt Father:tt
mother: tT Father Tt
mother:TT father:tt
Answer:
second option
Explanation:
brainly keeps marking my explanation as inappropriate?; had to delete it entirely
Can somebody help me?
DNA uses
1. ribose and uracil
2. deoxyribose and thymine
3. deoxyribose and adenine while RNA uses
1. deoxyribose and thymine 2. ribose and thymine
3. ribose and uracil
PH basic range of basic substances ?
Answer:
I think it should be 7 to 10
Answer:
It's so easy
between 7 to 14
what kind of molecule is represented in the diagram?
Answer:
The answer is D, a nucleotide
Explanation:
Answer:
A carbohydrate or (carb)
Explanation:
Giving me brainiest answer would be awesome!! :D
Describe the inflammatory process that occurs and include the role that neutrophils and monocytes
Answer:
Inflammatory process: When the body is invaded by germs or a bacterial infection, the body’s immune system will respond to it by creating antibodies and sending white blood cells to fight the germs or infection. As the immune system interacts with the invading pathogen, the infection site will go through the inflammatory process. This process will vary, depending on area that is being affected. It usually will consist of an injury response, an immune response, tissue healing and wound repair. As the body goes through bacterial or physical trauma, it will immediately respond by sending white blood cells to the area. Produced in the lymph nodes and in bone marrow, white blood cells are released into the bloodstream, devouring and cannibalizing the invading pathogens. As part of the inflammatory process, the localized area usually will become tender and particularly sore. If the trauma is on the skin, then the area also will be prone to discoloration. The inflammatory process is closely linked to the immune system. The immune system will dilate the blood vessels, forcing blood that is rich with oxygen and white blood cells to surround the trauma area. Inflammation is the accumulation of white blood cells as they surround and kill the invading pathogen. As the trauma area heals, there will be a certain amount of pus. The pus is a collection of dead cells from the invading pathogen as well as cells produced by the immune system. Some swelling usually will occur during the inflammatory process. Protein and water will surround the area, making the area inflamed and slightly disfigured. The protein will contain antibodies to protect the area from being re-infected and will encourage tissue growth and healing. Pain can be an ongoing component of the inflammatory process. As the physiological aspects of the trauma area change, the area can be continuously painful and tender. The inflammatory process usually ends as soon as the invading pathogen is eradicated or as soon as the trauma area heals. Pus formations will usually stop, the area will become stable, and inflammation will subside.
Role of neutrophils & monocytes:
Tissue Macrophage Is a First Line of Defense Against Infection. Within minutes after inflammation begins, the macrophages already present in the tissues, whether histiocytes in the subcutaneous tissues, alveolar macrophages in the lungs, microglia in the brain, or others, immediately begin their phagocytic actions.
When activated by the products of infection and inflammation, the first effect is rapid enlargement of each of these cells. Next, many of the previously sessile macrophages break loose from their attachments and become mobile, forming the first line of defense against infection during the first hour or so. The numbers of these early mobilized macrophages often are not great, but they are lifesaving.
Neutrophil Invasion of the Inflamed Area Is a Second Line of Defense. Within the first hour or so after inflammation begins, large numbers of neutrophils begin to invade the inflamed area from the blood. This is caused by products from the inflamed tissues that initiate the following reactions: (1) They alter the inside surface of the capillary endothelium, causing neutrophils to stick to the capillary walls in the inflamed area. This effect is called margination. (2) They cause the intercellular attachments between the endothelial cells of the capillaries and small venules to loosen, allowing openings large enough for neutrophils to pass by diapedesis directly from the blood into the tissue spaces. (3) Other products of inflammation then cause chemotaxis of the neutrophils toward the injured tissues, as explained earlier. Thus, within several hours after tissue damage begins, the area becomes well supplied with neutrophils. Because the blood neutrophils are already mature cells, they are ready to immediately begin their scavenger functions for killing bacteria and removing foreign matter.
Which kind of rock is most likely to contain a trilobite fossil?
1) sedimentary
2) igneous
3) metamorphic
4) plutonic
Explain how it formed. Thank you.
Answer:
Sandstone
Sandstone contains fossils of creatures such as trilobites, brachiopods, crustaceans, bryozoans and plants. Remains of land animals like mastodons and dinosaurs are much more likely to be found in sandstone.
Explanation:
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Which statement describes Mendel’s hypotheses regarding gametes?
A) gamete carries two genes for a trait.
B) gamete carries one allele for a gene.
C) gamete can carry multiple alleles for a trait.
D) Some gametes are dominant and some are recessive.
Answer:
The correct answer is B. A gamete carries one allele for a gene.
Explanation:
Gamete (also called sex cell or reproductive cell) is a haploid cell (having half number of chromosome as compared to the parent cell) that is produced through a cell division, termed as meiosis in sexually reproducing organisms.
According to the Law of segregation given by Gregor Mendel-
During the process of gamete formation, the two alleles of each gene segregate from one another so that a gamete carries one allele for a gene.
Thus, option B) is the right answer.
Answer:
B.
Explanation:
Algal blooms, and the rapid proliferation of photosynthetic plankton can ultimately end up depleting all the oxygen from a body of water
Answer:
True
Explanation:
The proliferation of phytoplankton (microalgae) may decrease the visibility which causes oxygen (O2) depletion because they consume important amounts of O2 during the night and cloudy days. An algal bloom refers to the sudden increase in the population of algae in water bodies. These algae consume O2 and block the sunlight from underwater plants. As the algae die and decompose, O2 concentration in the water decreases, and, in consequence, most aquatic life that depends on oxygen dies.
Answer: true
Explanation:
took the test 2023 edg
a. The P/O ratio of NADH is the mitochondria is _____________.
b. This means protons are pumped across the mitochondrial membrane by each NADH oxidized starting with complex The P/O ratio of FADH2 in bacteria is_____________.
Answer:
a). 2.3
b). 1.5
Explanation:
The P/O ratio stands for the[tex]\text{ phosphate / oxygen ratio}[/tex] in the cells. The P/O ratio is defined as the [tex]\text{amount of}[/tex] [tex]ATP[/tex] which is [tex]\text{produced from the movement}[/tex] of the two electrons by a defined electron transport chain and it is terminated by the reduction in the oxygen atom.
The P/O ratio of NADH in mitochondria [tex]10/(3.3 + 1) = 10/4.3 \approx 2.3[/tex]
The estimated P/O ratio for [tex]$FADH_2$[/tex] = 1.5
what elements are creating genetic materials
Carbon, Oxygen , nitrogen, hydrogen and phosphorus
Examine the mechanism of carbonic anhydrase. If the Zn2 were removed from the active site, and replaced with either Cu , Cd2 , or Fe3 would you expect the enzyme to still be functional
Answer: No
Explanation:
Carbonic anhydrase (CA; carbonate hydro-lyase) is a zinc-containing enzyme that catalyzes the reversible hydration of carbon dioxide: CO2+ H2O<-->HCO3(-)+H+. The enzyme is the target for drugs, such as acetazolamide, methazolamide, and dichlorphenamide, for the treatment of glaucoma.
The zinc ion is located in a cone-shaped cavity and coordinated to three histidyl residues and a solvent molecule. Inhibitors bind at or near the metal center guided by a hydrogen-bonded system comprising Glu-106 and Thr-199. The catalytic mechanism of CA II has been studied in particular detail. It involves an attack of zinc-bound OH- on a CO2 molecule loosely bound in a hydrophobic pocket. The resulting zinc-coordinated HCO3- ion is displaced from the metal ion by H2O. The rate-limiting step is an intramolecular proton transfer from the zinc-bound water molecule to His-64, which serves as a proton shuttle between the metal center and buffer molecules in the reaction medium.