A) Placenta! mammals
B) Aquatic mammals
C) All eutherians
D) Prototherians
Correct Answer: D
Solution :
The egg laying mammals, i.e., ovoviviparous mammals belong to the class-Protheria. The eggs of prototherian are poiylecithal or megalecithal, i.e., contain more amount of yolk. The amount of yolk is always comparatively more than cytoplasm.You need to login to perform this action.
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