1. Tardigrade
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  4. At puberty, only primary follicles remain are left in each ovary.

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Q. At puberty, only primary follicles remain are left in each ovary.

NTA AbhyasNTA Abhyas 2020Human Reproduction

Solution:

A large number of primary follicles degenerate during the phase from birth to puberty. Therefore, at puberty, only 60,000-80,000 primary follicles are left in each ovary. The primary follicles get surrounded by more layers of granulosa cells and a new theca and are called secondary follicles.