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

Question : 26

Artificial system of classification was first used by

a) Pliny the Edler

b) Linnaeus

c) De Candolle

d) Bentham and Hooker

Question : 27

In Down's syndrome of a male child, the sex complement is

a) XY

b) XX

c) XO

d) XXY

Question : 28

How many pairs of contrasting characters in pea pod were chosen by Mendel?

a) 3

b) 4

c) 2

d) 7

Question : 29

A common characteristic of all vertebrates is

a) presence of two pairs of functional appendages

b) presence of skull

c) division of body into head, neck, trunk and tail

d) body is covered with an exoskeleton

Question : 30

Genetic variation in a population arises due to

a) Recombination only

b) Mutations as well as recombination

c) Mutations only

d) Reproductive isolation and selection