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When the Circular Muscles of a Segment in an Earthworm

Question 75

Multiple Choice

When the circular muscles of a segment in an earthworm contract, that compartment _______, and when the longitudinal muscles of a segment contract, that compartment _______.


A) shortens and bulges outward; narrows and elongates
B) narrows and elongates; shortens and bulges outward
C) anchors the earthworm; projects forward
D) pulls other segments forward; projects forward
E) lengthens; shortens

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