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IceJOKER [234]
3 years ago
12

Recent research on biological factors in suicide has linked it to low levels of the neurotransmitter _______ in the brain.

Biology
1 answer:
MAXImum [283]3 years ago
8 0
The answer you are looking for is called Serotonin. Please put this as the brainiest answer thank you and hope this helped.
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amino acids

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ozzi

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In Western Pennsylvania, and many other areas, deer are becoming a pest.<br> a.) True<br> b.) False
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3 years ago
Which element matters least in the process of natural selection?
Lapatulllka [165]

Given question is incomplete as it lacks the group of choices. However, the group of choices associated with the question is as follows:

1. Organisms must display variation.

2. A trait must increase reproduction.

3. A trait must directly affect metabolism.

4. A trait must increase survival.

5. A trait must be able to be passed on to future generations.

Answer:

The correct answer is : option 3. A trait must directly affect metabolism.

Explanation:

The process that leads to change or adaption in the species or a population of the organism known as natural selection. In this process population exhibits the variation in the population due to the change or adaption.

This variation refers to the better traits and increased reproductive ability, suited to the environment than others which is also known as survival of the fittest as they increase their survival in comparison to the other population or species. Natural selection carries traits that are passed on to one generation to another.

Thus, the correct answer is option Is : 3. A trait must directly affect metabolism.

8 0
3 years ago
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