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Leviafan [203]
2 years ago
6

Describe an environmental factor that could influence natural selection and decrease genetic diversity and pick a specific examp

le to illustrate your point
Biology
2 answers:
Oksana_A [137]2 years ago
9 0

Answer:

Environmental factors play major role in influencing natural selection which ultimately influence genetic variation of the population and leads to evolution.

Natural selection favors the survival of the organisms which have better adaptations towards the changing environment. Thus, rest all the organisms fail to survive due to which genetic diversity of the population decreases.

For example, the increasing temperature of oceans is the major concern. Due to change in the temperature of the habitat (environmental factor) many organisms of a marine population (say a species X) have died.

Decrease in population size of X reduces the genetic diversity of the entire population.

However, the organisms which are better adapted to increased temperature will survive and eventually evolve with time.

Change in the population of Peppered Moth during and after industrial revolution is an another example which also explains how environmental factor influence natural selection.

Novay_Z [31]2 years ago
6 0

Answer:

Usually, Populations have a genetic variation among individuals, which is important to the population's ability to survive in different situations that have an effect on the natural selection. There are different factors which can increase or decrease the genetic diversity, and influencing natural selection.

These factors include an environmental factor, one of the major factors, which may cause changes in the genetic variation of a population and influence the natural selection. A famous and important example of environmental factors affecting natural selection was during the Industrial Revolution, when many more grey moths made up the moth population.

This was so that they could blend in with the soot from factories to avoid predators.

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Which situations would be most likely to engage the anterior cingulate cortex?
maria [59]

Answer:

Which of the following situations would be most likely to engage the anterior cingulate cortex?

A waiter walks over to your table at a restaurant and holds an open menu in front of you.

You walk into the elevator of your apartment building and press the button for your floor.

You enter your classroom and find someone sitting in your usual seat.

A good friend asks you to remind him of your telephone number.

Explanation:

In order to meet the demand of the surrounding environment   by adjusting  the  motor outputs from the brain to the environments ,a part of the emotion control part of the brain( limbic system) called the anterior cingulate cortex is responsible for this.

Anatomically, the limbic system is made up of the primarily the amygdala, hippocampus, thalamus, hypothalamus, basal ganglia and cingulate gyrus.

Based on the this its(anterior cingulate cortex) functions are formation of emotion in the limbic system, and  possessing  of memory and learning.

it is also a major  parts of  of pain networks for pain modulation and perception.

Therefore whenever there is  change in the environment  from the prestored condition in the brain,(e.g the usual seat  in the class room  occupied above) the anterior cingulate cortex adjust the motor input from the brain to adapt to the new environment to take an action,whih in this case  leads to the reclaiming of the seat or any other necessary proactive action.

4 0
2 years ago
The flowchart below shows the three generations of a cross between a pea plant that has yellow pods and a pea plant that has gre
tresset_1 [31]

Hello. This question is incomplete. Also, you forgot to show the flowchart. The flowchart is attached below and the full question is:

The flowchart below shows the three generations of a cross between a pea plant that has yellow pods and a pea plant that has green pods. Green pods are the dominant trait. The flowchart is missing the labels that describe the traits.

In which squares should the phrase “Green pods” appear?

1.A and D  2.B and E  3.A,C and D  4.A,B,C,D and E

Answer:

3.A,C and D

Explanation:

As shown in the question above, the flowchart shows the crossing of a pea plant with dominant features (green pods - AA) and a pea plant with recessive features (yellow features - aa). The crossing between plants with AA and aa alleles generates a completely Aa population, which in this case, has the dominant characteristic, that is, it has green pods. This is because the "Aa" alleles are called heterozygous and develop the dominant characteristic.

As we can see in the flowchart, the crossing between the two pea plants generated an offspring that is identified by table C, as we know this offspring has green pods and in the flowchart it is represented by a grayish rectangle. Therefore, we can say that the other gray rectangles represent pea plants with green pods, which are rectangles A, C and D.

4 0
2 years ago
The process of protein denaturation Multiple Choice: a) is only possible in proteins with quaternary structure. b) is permanent
pav-90 [236]

Answer:

The correct option is D.

Explanation:

Protein generally are very sensitive macro molecules; they have specific temperatures and pH that are ideal for their operations, this is especially true for proteins that act as enzymes in biochemical reactions.

There are four different types of structures that a protein can assume, these are primary, secondary, tertiary and Quaternary structure. The structure of a protein determines the kind of function it can perform.

There are some factors that can destroy the structure and functions of proteins, these include excessive heat and pH. A protein is said to be denatured when its secondary and tertiary structure have been disrupted or destroyed. Denaturation does not affect the primary structure of the protein, thus, the peptide bond remains intact.

Denaturation is usually temporary and can be reversed if the factors that cause denaturation is removed, this process is called RENATURATION. Renaturation process allow the protein to refold and resume its functions.  But sometimes,  denaturation  can be permanent and irreversible leading to permanent loss of protein functions.

7 0
2 years ago
Which class of molecules can directly cross the cell membrane without the aid of transport proteins? Choose one: A. Ions B. Suga
yulyashka [42]
Oxygen is a small molecule and it's nonpolar, so it easily passes through a cell membrane. Carbon dioxide, the byproduct of cell respiration, is small enough to readily diffuse out of a cell. Small uncharged lipid molecules can pass through the lipid innards of the membrane.
6 0
2 years ago
Step 8: Simulate an environment with equal amounts of insects and seeds, but no fruit. Which flock will be able to eat the most?
defon

The omnivorous flock will eat the most as it eats both insects and seeds. With the removal of fruit it will not be affected much.

The herbivorous flock will eat the least as it has the option to eat seeds only after the removal of fruit.

Explanation:

Let us take the example of Finches. Finches have many different species with different variations adaptable to conditions favorable as per availability of the type of food.

Lets say -

Species X and Y is provided with insects, seeds and fruit.

Species X - Omnivorous

Species Y - Herbivorous

The species X will be able to eat the most as it is an Omnivore.

The omnivorous flock will eat the most as it eats both insects and seeds. With the removal of fruit it will not be affected much.

Species Y will be able to eat the least as it is an herbivore.

The herbivorous flock will eat the least as it has the option to eat seeds only after the removal of fruit.

6 0
2 years ago
Read 2 more answers
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