set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

In class of Amphibia, respiration occurs through

a) skin

b) gills

c) lungs

d) All of these

Question : 2

Consider the following statements :

1. Human beings have 23 pairs of chromosomes.
2. Sex chromosome in human male are named XY.
3. Chromosomes are best seen in metaphase.

a) 1, 2 and 3

b) 2 and 3

c) 1 and 2

d) None

Question : 3

The factors which represent the contrasting pairs of characters are called

a) alleles

b) homologous pairs

c) dominant and recessive

d) determinants

Question : 4

‘Archaeopteyrx’ is a connecting link between which of the following classes of animal?

a) Reptilia and Mammalia

b) Amphibia and Aves

c) Reptilia and Aves

d) Aves and Mammalia