Given below are two statements regarding oogenesis. Statement I : The primary follicles get surrounded by more layers of granulosa cells, a theca and shows fluid filled cavity antrum. Now it is called secondary follicle. Statement II : Graafian follicle ruptures to release the secondary oocyte from the ovary by the process called ovulation. In the light of the above statements, choose the correct answer from the options given below: (NEET 2023 Phase-2)
Answer: (D) Statement I is incorrect but Statement II is true. Answer: (D) Statement I is incorrect but Statement II is true Solution: Statement I is incorrect because a follicle showing extra granulosa layers and a theca is a secondary follicle, but the fluid-filled cavity (antrum) appears only at the next stage — the tertiary follicle; NCERT attributes the antrum to the tertiary, not secondary, follicle.
- A.Both Statement I and Statement II are true
- B.Both Statement I and Statement II are false
- C.Statement I is correct but Statement II is false
- D.Statement I is incorrect but Statement II is true✓
Correct Answer
(D) Statement I is incorrect but Statement II is true
Solution & Explanation
Answer: (D) Statement I is incorrect but Statement II is true Solution: Statement I is incorrect because a follicle showing extra granulosa layers and a theca is a secondary follicle, but the fluid-filled cavity (antrum) appears only at the next stage — the tertiary follicle; NCERT attributes the antrum to the tertiary, not secondary, follicle. Statement II is correct — the Graafian follicle ruptures to release the secondary oocyte from the ovary by the process called ovulation. Hence I incorrect, II true. NCERT Reference: Ch 2, p.32, line 42 — "The secondary follicle soon transforms into a tertiary follicle which is"