Questions: If involution of the animal pole cells in the frog did not occur in gastrulation what would be the consequence? ectoderm would not form properly blastocoel would be destroyed archenteron would not form mesoderm would not form properly

The answer is: ectoderm would not form properly.

Explanation for each option:

1. Ectoderm would not form properly: The animal pole cells in frogs contribute to the formation of the ectoderm. If involution does not occur, the proper formation and differentiation of the ectoderm could be disrupted.

2. Blastocoel would be destroyed: The blastocoel is a fluid-filled cavity that forms during early development. Its destruction is not directly related to the involution of animal pole cells.

3. Archenteron would not form: The archenteron is formed during gastrulation, but its formation is more directly related to the movement of vegetal pole cells rather than the animal pole cells.

4. Mesoderm would not form properly: The mesoderm is formed from cells that move inward during gastrulation, but the animal pole cells are primarily involved in forming the ectoderm.

In summary, the involution of animal pole cells is crucial for the proper formation of the ectoderm.