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

Question : 21

Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?

a) Uracil, Cytosine - Pyrimidines

b) Guanine, Adenine - Purines

c) Thymine, Uracil - Pyrimidines

d) Adenine, Thymine - Purines

Question : 22

Modern man evolved from

a) Neanderthal man

b) Java man

c) Peking man

d) cro-magnon man

Question : 23

Which of the following group of animals maintains high and constant body temperature such as mammals ?

a) Birds

b) Reptiles

c) Amphibians

d) Fishes

Question : 24

In case of incomplete dominance the monohybrid ratio of phenotypes in F2 generation is

a) 3 : 1 : 1

b) 9 : 3 : 3 : 1

c) 1 : 2 : 1

d) 2 : 3 : 1

Question : 25

Consider the following statements :

1. Allosomes, are chromosome which are responsible for determination of sex, e.g., X and Y-chromosomes.
2. Autosomes, are chromosomes, which determine the somatic characters.

a) 1 and 2

b) 2 only

c) 1 only

d) None