In mung bean the resistance to yellow mosaic virus and powdery mildew were introduced by:

1. Mutations

2. Hybridization

3. Tissue culture

4. Genetic engineering

Pusa Shubhra, an improved variety of cauliflower, is resistant to:

1. White rust

2. Bacterial blight

3. Black rot

4. Leaf curl

To obtain a virus free plant, what can be used as an explant in micropropogation ?

1. Apical meristem

2. Axillary meristem

3. Either apical or axillary meristem

4. Embryo

In plants, somatic embryo regeneration is induced usually by a relatively high concentration of:

(1) Benzyl amino purine

(2) IAA

(3) 2,4 - D

(4) NAA

Inbreeding depression in animals can be overcome by:

1. A single outcross

2. Out cross for many generations

3. Cross-breeding

4. Inter-specific hybridization

Identify the incorrectly matched pair:

Meristem culture is especially important to obtain: 

1. Drought resistant plants

2. Virus free plants

3. Biofortified plants

4. Androgenic haploids

Consider the following statements:
 

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Match each item in Column I with one item in Column II and chose your answer from the codes given below:

Codes

            I           II         III         IV

1.         1           2           3           4

2.         2           1           4           3

3.         2           1           3           4

4.         1           2           4           3

Which one is the wrong pairing for the disease and its causal organism?

(1) late blight of potato-Alternaria solani

(2) Black rust of wheat-Puccinia graminis

(3) Loose smut of wheat-Ustilago nuda

(4) Root-knot of vegetables-Meloidogyne sp.