1)

Which plant hormone promotes dormancy in seeds and buds?

Class 10 Biology

A)

Auxin

B)

Gibberellin

C)

Cytokinin

D)

Abscisic acid

2)

Roots of plants are:

Class 10 Biology

A)

positively geotropic

B)

negatively geotropic

C)

positively phototropic

D)

None of these

3)

Response of plant roots towards water is called:

Class 10 Biology

A)

Chemotropism

B)

Phototropism

C)

Hydrotropism

D)

Geotropism

4)

Movement of sunflower in accordance with the path of Sun is due to

Class 10 Biology

A)

Chemotropism

B)

Geotropism

C)

Phototropism

D)

Hydrotropism

5)

Which plant hormone promotes cell division?

Class 10 Biology

A)

Auxin

B)

Gibberellin

C)

Cytokinin

D)

Abscisic acid

6)

The main function of abscisic acid in plants is

Class 10 Biology

A)

to promote cell division.

B)

to inhibit growth.

C)

 to promote growth of stem.

D)

 to increase the length of cells.

7)

Fall of mature leaves and fruits from plants is triggered by which of the following substance?

Class 10 Biology

A)

Auxin

B)

Cytokinin

C)

Gibberellin

D)

Abscisic acid

8)

Any change in the environment to which an organism responds is called

Class 10 Biology

A)

Stimulus

B)

coordination

C)

response

D)

hormone

9)

A part of the body which responds to the in-structions sent from nervous system is called

Class 10 Biology

A)

receptor

B)

effector

C)

nerves

D)

muscles

10)

The longest fibre on the cell body of a neuron is called

Class 10 Biology

A)

sheath

B)

cytoplasm

C)

Axon

D)

dendrites