Question

Match the items given in Column I with the most appropriate ones in Column II and rewrite the correct matching pairs:

	Column I		Column II
(a)	Leydig Cells	1.	Lack of thyroxine in children
(b)	Stoma	2.	12 pairs
(c)	Ova	3.	Testosterone
(d)	Cranial nerve	4.	Diffusion of respiratory gases
(e)	Cretinism	5.	Haploid cells
		6.	31 Pairs
		7.	Diploid cells

Answer 1

	Column I		Column II
(a)	Leydig Cells	3.	Testosterone
(b)	Stoma	4.	Diffusion of respiratory gases
(c)	Ova	5.	Haploid cells
(d)	Cranial nerve	2.	12 pairs
(e)	Cretinism	1.	Lack of thyroxine in children

Explanation:

1. Leydig cells: The main function of these cells is to secrete androgens, such as testosterone (a male sex hormone).
2. Stoma: The stoma facilitates gas transfer between the plant's leaves and the atmosphere.
3. Ova: These are female gametes, which are haploid.
4. Cranial nerves: Higher vertebrates have twelve pairs of cranial nerves.
5. Cretinism: It is a disorder that causes aberrant mental and physical growth in children as a result of a shortage of thyroid gland hormones, or thyroxine.