set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Down’s syndrome is due to

a) chromosome number increase in 18th pair autosome

b) chromosome number decrease in 21st pair autosome

c) chromosome number increase in 21st pair autosome

d) chromosome number decrease in 18th pair autosome

Question : 2

Which of the following is not a pteridophyte?

a) Polypodium

b) Ginkgo

c) Selaginella

d) Azolla

Question : 3

Which bacteria is utilized in gober gas plant?

a) Ammonifying bacteria

b) Methanogens

c) Nitrifying bacteria

d) Denitrifying bacteria

Question : 4

Which one of the following is not a feature of eutrophic lakes?

a) Primary productivity is low

b) Blooms are frequent in eutrophic lakes

c) Plant nutrient flux is high

d) Dominated by blue green algae

Question : 5

Match List-I with List-II :

a) 4 3 1 2

b) 3 4 1 2

c) 4 3 2 1

d) 3 4 2 1

Question : 6

The book ‘Origin of Species’ was written by

a) Mendel

b) Darwin

c) Lamarck

d) de Vries