Consider Species A, B, and C, Who Share a Knuckle-Walking

question 53

Multiple Choice

Consider species A, B, and C, who share a knuckle-walking common ancestor. Species A and B are bipedal. Species C is a knuckle walker. Which of the following is most likely to be true?

• A) A and B are more closely related to each other than to C.
• B) A and C are more closely related to each other than to B.
• C) C and B are more closely related to each other than to A.
• D) There is not enough information to determine the most likely relationship.

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Definitions:

Reuptake

The process by which neurotransmitters are taken back into the neurotransmitter vesicles in the nerve cells after they have been released.

Serotonin

A neurotransmitter associated with mood regulation, digestion, sleep, and other bodily functions, playing a key role in preventing depression and regulating anxiety.

Axon Terminal

The endpoint of an axon or nerve fiber, where it makes synaptic connections with another nerve cell or muscle cell.

Selective Permeability

A property of cellular membranes that allows certain substances to pass through while keeping others out.