genetics, evolution of life & ecological biodiversity - Category wise Question and Answer Practice Test with Solutions

genetics, evolution of life & ecological biodiversity PRACTICE TEST [5 - EXERCISES]

set 1

set 2

set 3

set 4

set 5

Question : 1 [PSC (Pre) 2018]

‘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

Answer: (c)

Question : 2

In which one of the following sets of animals do all the four give birth to young ones?

a) Kangaroo, Hedgehog, Dolphin, , Loris

b) Platypus, Penguin, Bat, Hippopotamus

c) Shrew, Bat, Cat, Kiwi

d) Lion, Bat, Whale, Ostrich

Answer: (a)

Penguin, kiwi & ostrich all belong to class Aves of chordata (i.e. birds) and they do not give birth to their young ones, they are oviparous while kangaroo, hedgehog, dolphin, loris all belong to class mammalia and are viviparous.

Question : 3

In class of Amphibia, respiration occurs through

a) skin

b) gills

c) lungs

d) All of these

Answer: (d)

Question : 4

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.
Which of the statements given above are false about chromosomes?

a) 1, 2 and 3

b) 2 and 3

c) 1 and 2

d) None

Answer: (d)

Humans have 46 chromosomes i.e., 23 pairs of chromosomes, of which 21 pairs are autosomes and 2 pairs are allosomes or sex chromosomes.

Human male sex chromosomes are named XY. During cell division, the chromosomes of every cell are most condensed are arrange themselves on the equatorial plane which makes them best visible.

Question : 5

The factors which represent the contrasting pairs of characters are called

a) alleles

b) homologous pairs

c) dominant and recessive

d) determinants

Answer: (a)

IMPORTANT general science mcq EXERCISES

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1715 genetics, evolution of life & ecological biodiversity based general science mcq set 4 question answer pdf
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