(i) Blastocyst |
(ii) Morula |
(iii) Zygote after 30 hours of fertilisation |
(iv) Ovum |
Answer:
(i) At the stage of blastocyst formation about 64 cells are present. (ii) Morula is 16-celled stage. (iii) Zygote after 30 hours of fertilisation has 2 cells. (iv) Ovum is single-celled.
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