In spermatogenesis four haploid spermatids are formed by
A) differentiation of the sperm cells.
B) meiotic division of the secondary spermatocyte.
C) meiotic division of the primary spermatocyte.
D) asymmetric cell division of spermatogonia.
E) proliferation of the spermatogonia.
Correct Answer:
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Q20: A delay in embryonic development is called
A)
Q21: In species of hard coral such as
Q22: Which one of the following statements is
Q23: Primordial germ cells
A) are relatively numerous in
Q24: In oogenesis
A) the primary oocyte divides symmetrically
Q26: In mammals, the oocyte is surrounded by
A)
Q27: The first diploid cell formed after fertilisation
Q28: Egg activation
A) occurs when the acrosomal vesicle
Q29: Additional sperm are prevented from fusing with
Q30: In many animals, excluding mammals, the contribution
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