CBSE - Control and Coordination

1 Control and Coordination 

Which one of the following pairs do regulate the flowering in plants?

(1) Auxin and Ethylene 
(2) Cytokinin and Ethylene
(3) Florigen and Phytochrome 
(4) Gibberellin and Ethylene

2 Control and Coordination 

The major natural Auxin is ….

(1) IBA 
(2) 2, 4D 
(3) IAA 
(4) NAA 

3 Control and Coordination 

An average Gestation period in Human beings is .....

(1) 290 days
(2) 280 days
(3) 275 days
(4) 300 days

4 Control and Coordination 

Match the items in Group-1 with Group- 2.


Choose the correct answer :
(1) A-iv, B-i, C-iii, D-ii (2) A-iii, B-i, C-iv, D-ii (3) A-iii, B-iv, C-i, D-ii (4) A-ii, B-i, C-iv, D-iii

5 Control and Coordination 

Which of the following gives the correct sequence of the composition a reflex arc?

(1) receptors -> muscle -> sensory neuron -> motor neuron -> spinal cord
(2) receptors -> motor neuron -> spinal cord -> sensory neuron -> muscle
(3) receptors -> spinal cord -> sensory neuron -> motor neuron -> muscle
(4) receptors -> sensory neuron -> spinal cord -> motor neuron -> muscle

6 Control and Coordination 

In a neuron, conversion of electrical signal to a chemical signal occurs at/in
(1) Axon (2) Dendrite end (3) Axonal end (4) Cell body

7 Control and Coordination 

In how many parts human brain is divided
(1) 4 (2) 5 (3) 3 (4) 2

8 Control and Coordination 

Involuntary actions including blood pressure, salivation and vomiting are controlled by-

(1) Cerebellum
(2) Pons
(3) Cerebrum
(4) Medulla

9 Control and Coordination 

How many spinal nerves are attached to the spinal cord of man ?

(1) 62 
(2) 42 
(3) 31 
(4) 21

10 Control and Coordination 

How many pairs of spinal nerves arise from spinal cord ?
(1) 31 Pairs (2) 30 Pairs (3) 40 Pairs (4) None of these