The Questions Below Refer to the Following Evolutionary Tree, in Which

question 8

Multiple Choice

The questions below refer to the following evolutionary tree, in which the horizontal axis represents time (present time is on the far right) and the vertical axis represents morphological change.

-Which of these is the extant (that is, living) species most closely related to species X?

• A) V
• B) W
• C) Y
• D) Z

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Definitions:

Cerebellum

A major structure of the hindbrain crucial for motor control, coordination, precision, and timing of movements.

Precise Timing

The exact or very accurate measurement or control of time intervals.

Cerebellum

A region of the brain that plays an important role in motor control, and it may also be involved in some cognitive functions such as attention and language.

Endocrine System

A network of glands in the body that produce and release hormones directly into the bloodstream to regulate various bodily functions.