BIOLOGY COLLEGE

2. Name three differences between a plant and animal cell.

Answers

Answer 1
Answer:

Answer:

1. Plant cells have a square or boxy shape but animal cells are round

2. Plant cells have a cell wall and contain chloroplasts

3. Animal cells have multiple vacuoles but plant cells have one large central vacuole
Answer 2
Answer:

Answer:

Major structural differences between a plant and an animal cell include: Plant cells have a cell wall, but animal cells do not. Cell walls provide support and give shape to plants. Plant cells usually have one or more large vacuole(s), while animal cells have smaller vacuoles if any are present.

Explanation:

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Changing the pendulum design after the first trial was an example of _____________ to solve the problem presented by the teacher. A) designing the model B) evaluating the model C) identifying the problem D) doing research on the problem

Imagine that you are Gregor Mendel and you want to assure yourself that the F1 generation plants you generated from crossing true-breeding plantsactuallyare heterozygotes. You perform a testcross by mating all of your F1 smooth pea plants with plants that are homozygous recessive (wrinkled pea plants).

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You should find another homozygous recessive if it it a homozygous dominate then you will not receive any recessive plants

Describe what will occur the population if it increases in number when food is scarce?

Answers

Answer:

more people will die

Explanation:

If you have a big population and little food mor peple will die.
There will also be riots in the streets, criminals acts will increase, this could come from stealing to murdering for food, the animal kingdom will basically go near extinction if the government can’t control its people from hunting, ultimately governments might collapse under the demands of the people.

You are studying primates in West Africa and discover a small population of monkeys in an isolated forest. They resemble a species that lives about 50 kilometers away, across a river. The main difference appears to be white tufts of fur underneath the ears in the new population you've found. What evolutionary mechanism probably explains this difference?

Answers

Answer:

Geographical isolation

Explanation:

The evolutionary mechanism that can probably explain the difference, in this case, is geographical isolation.

Geographical isolation represents one of the reproductive isolation mechanisms - an array of physiological and behavioural processes that leads to speciation in living organisms.

Geographical isolation refers to the separation of organisms of the same species in terms of physical geographical features such as distance, mountains, water bodies, etc. The separation causes each group to take different adaptive paths, eventually leading to speciation, that is, they become separate species.

In this case, the small population of monkeys in the isolated forest must have been geographically isolated from their counterparts in some ways back. They took a different adaptive path from the larger group as a result of geographical difference and eventually became a new species.

How does a vaccination help to prevent a disease? it reduces the severity of symptoms to a disease. it generates a population of memory cells that speed up response to an actual infection. it generates a population of plasma cells that increase the concentration of antibody in the bloodstream. it establishes defenses that prevent a pathogen from returning to the body?

Answers

Answer:
             Vaccine generates a population of plasma cells that increase the concentration of antibody in the bloodstream.
Explanation:
             Vaccines are inactive or non functional infectious agents enter into the body in order to generate antibody against such agents In future if virus or bacteria that is resemble to the structure of already injected agents attack on human body. The immune system get alert and antibody which are already produced attack on them and prevent them from causing disease.

_______ _______ _______ have been observed and documented in a wide range of animals and over a large number behaviors related to survival and reproduction.

Answers

Answer:

The answer is Fixed Action Patterns

Explanation:

Fixed Action Patterns are fixed behaviors in certain animals which they carry out in response to stimulus. This patterns are constantly repeated and do not change for a particular species.

Animals are born with this pattern so they do not need to learn it. Fixed Action Patterns increases the fitness, survival and the reproduction abilities of the animals.

What are three techniques that can be used to show that the electron transport chain is found on the matrix side of the inner mitochondrial membrane. Select all that apply.

Answers

Answer:

Explanation:

Step 1: Generating a Proton Motive Force

The hydrogen carriers (NADH and FADH2) are oxidised and release high energy electrons and protons

The electrons are transferred to the electron transport chain, which consists of several transmembrane carrier proteins

As electrons pass through the chain, they lose energy – which is used by the chain to pump protons (H+ ions) from the matrix

The accumulation of H+ ions within the intermembrane space creates an electrochemical gradient (or a proton motive force)

Step Two: ATP Synthesis via Chemiosmosis

The proton motive force will cause H+ ions to move down their electrochemical gradient and diffuse back into matrix

This diffusion of protons is called chemiosmosis and is facilitated by the transmembrane enzyme ATP synthase

As the H+ ions move through ATP synthase they trigger the molecular rotation of the enzyme, synthesising ATP

Step Three: Reduction of Oxygen

In order for the electron transport chain to continue functioning, the de-energised electrons must be removed

Oxygen acts as the final electron acceptor, removing the de-energised electrons to prevent the chain from becoming blocked

Oxygen also binds with free protons in the matrix to form water – removing matrix protons maintains the hydrogen gradient

In the absence of oxygen, hydrogen carriers cannot transfer energised electrons to the chain and ATP production is halted
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