A) reptiles
B) birds
C) mammals
D) insects
Correct Answer: D
Solution :
The ammount of yolk determine the type of cleavage in the egg. In supperfecial meroblastic cleavage, the cleavage remains restricted to the peripheral portion of the egg. This cleavage occur in arthropods espicialy insects. In birds and reptiles discoidal meroblastic cleavage occurs where, divisions are confined to the cylopasmic disc at animal pole. In mammals, holoblasticclevageoccurs i. e., division of whole egg and not a part.
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