In mammals the chorion and the allantois together form
Placenta
Endometrium
Uterus
Yolk sac
(a)In eutherian mammals chorion and allantois together form placenta.
Female rabbit is
Blood flowing in umbilical cord of mammalian embryo is
The undifferentiated primordial germ cells are larger in size and their chromatin rich nuclei are distinct in
Which of the following labelled parts produces energy for the movement of the tail that facilitate sperm motility essential for fertilisation?
Eggs having yolk in their centre of cytoplasm in peripheral layer are called
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