CBSE - Control and Coordination

1 Control and Coordination 

If you keep a ripened fruit in the midst of a basket of raw fruits, all the fruit s get ripened in short period. Because of
(1) Auxin produced by ripened fruits.
(2) Abscisic acid produced by ripened fruits.
(3) Ethylene produced by ripened fruits.
(4) Gibberellins produced by ripened fruits.

2 Control and Coordination 

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

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

3 Control and Coordination 

Which of the following pairs are correctly matched?

(i) Cereal crops -­ Sorghum (ii) Pulse crops ­- Lentil
(iii) Oil seed crops - ­ Sesame (iv) Fodder crops -­ Castor

(1) (i) & (ii) (2) (ii) & (iv) (3) (i), (ii) & (iii) (4) (iii) & (iv)

4 Control and Coordination 

Name the plant hormone responsible for falling of senescent leaves
(1) Gibberelin (2) Auxin (3) Cytokinin (4) Abscisic acid

5 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

6 Control and Coordination 

The sensitive plant Mimosa pudica shows seismonastic movement as a result of which the whole leaf droops down. The drooping is due to _____.
(1) Loss of turgidity of the basal part of the leaf
(2) Swelling of the basal part of the leaf
(3) Change in direction of the leaf growth
(4) None of these

7 Control and Coordination 

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

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

8 Control and Coordination 

One of the following is a mismatched pair.

(1) Gibberellins-delaying dormancy in seeds.
(2) Ethylene-ripening of fruit.
(3) Auxins-cell elongation.
(4) Abscisic acid-closing of stomata.

9 Control and Coordination 

The major natural Auxin is ….

(1) IBA 
(2) 2, 4D 
(3) IAA 
(4) NAA 

10 Control and Coordination 

Corpus callosum present in

(1) Medulla Oblongata
(2) Pons
(3) Cerebreum
(4) Cerebellum