People recovering from long illness are often advised to include the alga Spirulina in their

diet because it

1. makes the food easy to digest

2. is rich in proteins

3. has antibiotic properties

4. restores the intestinal microflora.

Somaclonal variation can be obtained by

(1) application of colchicine

(2) irradiation with gamma rays

(3) tissue culture

(4) hybridisation.

Somaclonal variation appears in

(1) organisms produced through somatic hybridization

(2) plants growing in highly polluted conditions

(3) apomictic plants

(4) tissue culture raised plants.

In the following table identify the correct matching of the crop, its disease and the corresponding pathogen.

Somaclonal variation is seen in 

1. tissue culture grown plants

2. apomicts

3. polyploids

4. vegetatively propagated plants

Which of the following is a correct match between crop, variety and resistance to diseases ?

Apiculture is associated with which of the following groups of plants ?

(1) Grapes, maize, potato

(2) Sugarcane, paddy, banana

(3) Guava, sunflower, strawberry

(4) Pineapple, sugarcane, strawberry

Pebrine in silkworms is caused by:-
(1) Dugesia

(2) Monocystis

(3) Nosema

(4) Plasmodium

Which of the following is not true for inbreeding?

(1) It causes inbreeding depression after a few generations.

(2) It always increases the productivity.

(3) It is used to produce a pure line.

(4) It leads to homozygosity.

The phenomenon that operates in the formation of root or shoot in a callus culture is

1. differentiation

2. re-differentiation

3. de-differentiation

4. re-juvenation.