Which Morphological Feature in Lizards, Mammals, and Birds Provides Evidence

question 14

Multiple Choice

Which morphological feature in lizards, mammals, and birds provides evidence of their descent from a shared ancestor?

• A) ribcages positioned right behind heads in the embryonic stage
• B) absence of limb buds in embryonic development
• C) presence of limb buds in embryonic development
• D) differences in limb structures in adults
• E) vestigial hindlimbs near the base of the tail in adults

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Definitions:

GABA

Gamma-aminobutyric acid (GABA) is the primary inhibitory neurotransmitter in the brain, playing a crucial role in regulating neuronal excitability and involved in anxiety reduction and sleep regulation.

Reduced Anxiety

A state or condition where there is a decrease in feelings of nervousness, worry, or unease.

Sensory Perceptual

Relating to the perception of sensory information from the environment, including how the brain interprets stimuli from the senses.

Benzodiazepines

A class of psychoactive drugs known to enhance the effect of the neurotransmitter GABA, used to treat conditions such as anxiety, insomnia, and seizures.