set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Desert plants have longer root system because

a) Roots grow in search of water

b) Soil does not contain water, hence becomes compact and presses the roots to grow longer

c) High temperature of the soil stimulates the growth of roots

d) Roots moves opposite to the solar heat

Question : 2

Among the following organisms, which one does not belong to the class of other three?

a) Mite

b) Scorpion

c) Crab

d) Spider

Question : 3

In which part of the cinchona plant quinine occurs naturally?

a) Fruit

b) Seed

c) Root

d) Bark

Question : 4

Consider the following animals.

1. Sea cow
2. Sea horse
3. Sea lion

a) 1 and 3

b) 2 and 3

c) Only 1

d) All of these

Question : 5

What is a mushroom?

a) Plant

b) Animal

c) Fungi

d) Bacteria

Question : 6

Which one of the following statements is not correct?

a) Roundworm has no circulatory system

b) In bony fishes, swim bladder is usually present

c) All echinoderms are viviparous

d) In cartilaginous fishes, fertilization is internal