Homologous Structures Are

question 37

Multiple Choice

Homologous structures are

• A)structures of animals that appear to have evolved from different parts of their bodies.
• B)structures of animals that have different appearances and functions but seem to have evolved from the same body part in a common ancestor.
• C)structures of animals that have the same appearances and functions but obviously no common ancestor.
• D)structures of animals that have different appearances and functions but different ancestors.

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Definitions:

Associated

Connected or linked with something else in relation to ideas, feelings, or memories.

Reflex

It is an involuntary, immediate response to a specific stimulus without conscious thought.

Classical Conditioning

A learning mechanism where the consistent association of two stimuli leads to a response, initially evoked by the second stimulus, being evoked by the first stimulus alone over time.

Extinction

In psychology, the gradual weakening and disappearance of a conditioned response when the conditioned stimulus is no longer paired with the unconditioned stimulus.