Ncert Exercises & Solutions

Identify the wrong statement from the following:

1.	High levels of estrogen trigger the ovulatory surge.
2.	Oogonial cells start to proliferate and give rise to functional ova in regular cycles from puberty onwards,
3.	Sperms released from seminiferous tubules are poorly motile/ non-motile.
4.	Progesterone level is high during the post ovulatory phase of menstrual cycle.

(b) The process of formation of a mature fernale gamete is called cogenesis. Unlike sperm formation that starts at puberty, egg formation begins before birth. Primordial germ cells complete the proliferative stage of oogenesis in the early embryonal stage when million of gamete mother cells (oogonia) are formed within each faetal ovary, no more oogonia are formed and acided after birth.

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