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sveticcg [70]
3 years ago
6

Distinguish between directional, stabilizing, and disruptive selection. Give examples.

Biology
1 answer:
Pepsi [2]3 years ago
8 0
Distribution of phenotypes within a population may be impacted by different types of natural selection. These types of selection include;
Directional selection involves a change in the environment shifts of phenotypes observed. Example is the giraffe neck-length, where the length got longer and longer over time to reach the leaves at the top of trees.
Stabilizing selection , this is a selection where an average phenotype is favored. example is number of eggs laid by birds such that too many eggs will be a waste of energy because some chicks would starve.
Disruptive selection is a selection where individuals with an average value of a trait are affected most while those with values below average are affected least. Example small individuals are capable of hiding from predators while big individuals can not fit in the hiding place but instead will fight with predators.

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<h2>Answer:</h2>

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Explanation:

3 0
4 years ago
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A college student wakes up and notices a racing heart and dilated pupils. The student is scheduled to write an exam later that m
kozerog [31]

Answer:

Sympathetic nervous system

Explanation:

Under stress conditions, the sympathetic division of the autonomic nervous system prepares the body by exhibiting flight or fight response. It includes some physiological changes in the body during stress conditions such as before and during exams.

Some of the physiological responses of the sympathetic nervous system are rapidly pounding, dilated pupils of eyes, deep breathing, dry mouth, and sweaty skin. It also shunts the blood circulation towards active skeletal and cardiac muscles. Dilation of bronchioles to increase ventilation to facilitate the delivery of more oxygen to the body cell is another change stimulated by the sympathetic nervous system. Therefore, the mentioned responses are due to the activation of the sympathetic nervous system of the student since he is in the stress of the exam.

4 0
4 years ago
What is the sequence of events in the transmission of an impulse through the heart muscle?
zimovet [89]
<span>The sequence is as follows:
c, d, a, b, f, g, e

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4 0
3 years ago
What is an experimental curve?
Allisa [31]
I don't think here is a definition for experimental curve if there is then I'm sorry
6 0
4 years ago
What statement is true about macromolecules?
sammy [17]
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Let me know if you need further elaboration, I took human nutrition last semester. :)


3 0
3 years ago
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