Pusa Shubhra, an improved variety of cauliflower, is resistant to:
1. White rust
2. Bacterial blight
3. Black rot
4. Leaf curl
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTo 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyInbreeding depression in animals can be overcome by:
1. A single outcross
2. Out cross for many generations
3. Cross-breeding
4. Inter-specific hybridization
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMeristem culture is especially important to obtain:
(1) Drought resistant plants
(2) Virus free plants
(3) Biofortified plants
(4) Androgenic haploids
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich 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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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the following four measures (A-D) that could be taken to successfully grow chick pea in an area where bacterial blight disease is common
(A) spray with Bordeaux mixture
(B) control of the insect vector of the disease pathogen
(C) use of only disease-free seeds
(D) use of varieties resistant to the disease
Which two of the above measures can control the disease?
(1) B and C
(2) A and B
(3) C and D
(4) B and D
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology