Q. No.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:
|
|
Crop Variety |
Resistant to |
|
1. |
Himgiri |
Leaf and stripe rust |
|
2. |
Karan rai |
White rust |
|
3. |
Pusa sadabahar |
Bacterial blight |
|
4. |
Pusa shubhra |
Black rot |
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 :
I. Asexual reproduction preserves the genetic information while sexual reproduction permits variations.
II. Traditional hybridisation often leads to inclusion and multiplication of undesirable genes along with the desired genes.
III. rDNA technology allows us to isolate and introduce only one or set of desirable genes without introducing undesirable genes in the target organism
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
Consider the following statements:
| I: | Hairy leaves are associated with resistance to jassids in cotton and cereal leaf beetle in wheat. |
| II: | Low aspartic acid, high nitrogen, and sugar content in maize leads to resistance to maize stem borers. |
| III. | In wheat, solid stems lead to non-preference by the stem sawfly and smooth-leaved and nectar-less varieties of cotton do not attract bollworms. |
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:
|
Column I |
Column II |
|
I. Pusa Swarnim II. Pusa Shubhra III. Pusa Komal IV. Pusa Sawani |
1. Cauliflower 2. Brassica 3. Okra 4. Cow pea |
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.
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