Match List-I with List-II

Choose the correct answer from the options given below:

(A)-(IV), (B)-(III), (C)-(II), (D)-(I)

The correct answer is Option (1) → (A)-(IV), (B)-(III), (C)-(II), (D)-(I)

A. The primary sex organs – the testis in the males produce gametes, i.e, sperms by the process called gametogenesis.In testis, the immature male germ cells (spermatogonia) produce sperms by spermatogenesis that begins at puberty.

B. Sperm is a microscopic structure composed of a head, neck, a middle piece and a tail. A plasma membrane envelops the whole body of sperm. The sperm head contains an elongated haploid nucleus. The head is covered by the acrosome, a cap-like structure that contains enzymes to help the sperm penetrate the egg during fertilization.

C. The regions outside the seminiferous tubules called interstitial spaces, contain small blood vessels and interstitial cells or Leydig cells. Leydig cells synthesise and secrete testicular hormones called androgens.

D. Each seminiferous tubule is lined on its inside by two types of cells called male germ cells (spermatogonia) and Sertoli cells. The male germ cells undergo meiotic divisions finally leading to sperm formation, while Sertoli cells provide nutrition to the germ cells.