Answer with explaining the reason for the same.
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Ans 15. Holoblastic cleavage
Sea urchins undergo holoblastic cleavage.
The fertilized eggs which contain a little amount or no yolk, the cells are divided completely by cytokinesis. This is known as holoblastic or total cleavage.
Ans 16. Centrolecithal egg
Ans 15. Holoblastic cleavage
Sea urchins undergo holoblastic cleavage.
The fertilized eggs which contain a little amount or no yolk, the cells are divided completely by cytokinesis. This is known as holoblastic or total cleavage.
Ans 16. Centrolecithal egg
Superficial cleavage occurs in centrolecithal egg where the yolk is present at the centre with cytoplasm around it.
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