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Mazyrski [523]
3 years ago
13

The axons of a motor neuron release a neurotransmitter which generates an impulse to contract a muscle. What is this neurotransm

itter called?
Biology
1 answer:
aleksandrvk [35]3 years ago
4 0
Answer: Acetylcholine. The axons of a motor neuron release the said neurotransmitter which generates an impulse to contract a muscle. It is an organic chemical that functions in the brain and body of organisms.
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Convergent evolution is the concept of two or more species evolving similar traits despite being completely unrelated to one another, including the absence of a common ancestor.

The Platyrrhines, more commonly known as "New World Monkeys", share many characteristics with the Prosimians. Some of these include:

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The Platyrrhines and the Prosimians are both nocturnal animals. Despite all other members of their family being active during the day, the Playrrhines have evolved nocturnal habits similar to that of the Prosimians. Aside from that, they<u> feed on insects</u> more so than fruit, which is reflected by the layout of their teeth, and have eyesight well adapted to dark conditions. All of these are traits they share with the Prosimians.

Despite being in different ecosystems and regions, and sharing no recent common ancestors, both of these species <u>have evolved strikingly similar traits.</u> This can be used to corroborate the theory of convergent evolution, which explains how <u>two </u><u>species </u><u>can </u><u>evolve</u><u> very similar </u><u>traits </u><u>despite being unrelated.</u>

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Elias conducted an experiment about the effects of exercise on the heart rate of teenagers. Before morning basketball practice,
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The <u><em>correct answer</em></u> is:

He needs to select a more representative sample.

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Choosing students from the basketball team for the sample he uses on a study of heart rates and exercise will be a biased sample.  This is because students on the basketball team are potentially healthier than other students, which means that exercise will not have a large an effect on their heart rate as it would if they were not as healthy and not as physically fit.

In order to reduce the amount of bias, he should choose students from different groups throughout the school.

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