The nourishing cells in the seminiferous tubules are

Which one of the following characters favours the process of normal spermatogenesis in human male?

After ovulation,the Graafian follicle transforms into:

If $2n = 16$ in a primary spermatocyte which is in the metaphase of the first meiotic division,what shall be the total number of chromatids in each of the secondary spermatocytes?

What is the process of yolk synthesis called?

The membrane investing the ovum just outside the membrana granulosa is