1. Gastrulation involves the differentiation of -'

2. 1st polar body is formed at which stage of oogenesis -'

3. Which among the following has 23 chromosomes?

4. Corpus luteum develops from -'

5. Hormone responsible for the secretion of milk after parturition is -'

6. Location and secretion of leydig cells are -'

7. In uterus, endometrium increases in thickness in response to -'

8. The seminal plasma is rich in -'

9. Egg is liberated from ovary in -'

10. Corpus luteum secretes -'

11. The given figure depicts a diagrammatic sectional view of the human female reproductive system. Select the option with correctly identified parts.

12. What is present in the middle piece of sperm?

13. Match the structures of male reproductive system given in column I with their features given in column II and select the correct match from the options given below. Column I (Structures) Column II (Features) A Rete testis (i) Facilitates insemination B Leydig cells (ii) Meiosis and sperm formation C Seminiferous tubules (iii) Connects seminiferous tubules to vasa efferentia D Penis (iv) Secrete androgens

14. Sperms produce an enzymatic substance for dissolving egg membrane called -'

15. A change in the amount of yolk and its distribution in the egg will affect -'

16. The nutritive cells found in seminiferous tubules are -'

17. Identify the odd one from the following. [NCERT Exemplar]

18. Signals for parturition originate from -'

19. In 28 days of human ovarian cycle, ovulation occurs on -'

20. Which of the following is immortal?

21. The Leydig cells found in the human body are the secretory source of -'

22. Match between the following representing parts of the sperm and their functions and choose the correct option. [NCERT Exemplar] Column I Column II (A) Head (i) Enzymes (B) Middle piece (ii) Sperm motility (C) Acrosome (iii) Energy (D) Tail (iv) Genetic material Options

23. About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH surge) normally occurs?

24. Cleavage of zygote forms 2, 4, 6, 8, and 16 cells. These cells are called -'

25. The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.[NCERT Exemplar]