A) mesoderm
B) endoderm
C) ectoderm
D) all the three germinal layers
Correct Answer: B
Solution :
During the development of zygote of earthworm macromeres develop into endoderm. Macromere is a large cell form the vegetative pole of a developing egg. Such a cell contains yolk and gives rise to the endoderm of the embryo.You need to login to perform this action.
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