Why Do Some Biologists NOT Consider Reptiles to Be a Monophyletic

question 30

Multiple Choice

Why do some biologists NOT consider reptiles to be a monophyletic group?

• A) Reptiles evolved independently at several different times in the past and from several different ancestral species.
• B) Reptiles, birds, amphibians, and fish appeared in the fossil record at approximately the same time.
• C) All reptiles do not reproduce sexually.
• D) The ancestors of reptiles are the class Amphibia.
• E) Birds are the direct descendants of some reptiles.

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Definitions:

Pupil Dilation

The enlargement of the pupil, the black center of the eye, in response to various factors such as low light, arousal, or certain drugs, to allow more light to enter the eye.

Accelerated Heartbeat

An increase in heart rate, which can be a physiological response to exercise, stress, or emotional states.

Medulla

The lower part of the brainstem, responsible for regulating vital bodily functions such as heartbeat and breathing.

Selectively Attend

The process by which individuals focus on certain stimuli while ignoring others in their environment.