1.

Animal rotates on its 101 ,gitudinal axis. The reason behind it isA. the more vigorous beat of longer cilia present in the oral groove than that of . body surface.B. the less vigorous beat of longer cilia present in the oral groove than that of body surface.C. difference in length of cilia is not re- sponsible.D. more than one of the foregoing.

Answer» Correct Answer - A


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