Comparison of the Wings of Birds and the Wings of Bats

question 19

Multiple Choice

Comparison of the wings of birds and the wings of bats reveal that they____.

• A)are completely homologous structures
• B)are completely analogous structures
• C)are completely homoplastic structures
• D)are vestigial structures
• E)have homoplastic and homologous components

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Definitions:

Acupuncture

A form of alternative medicine and a key component of traditional Chinese medicine involving thin needles inserted into the body at specific points.

Endorphins

Endogenous substances that offer pain relief and increase pleasure sensations.

Agonists

Substances that activate neurotransmitter receptors, enhancing the natural activity of neurotransmitters.

Antagonists

These are substances or muscles that counteract or oppose the function or action of another—for example, a muscle that opposes the action of another muscle or a drug that blocks receptors for neurotransmitters.