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

Subtopic:  Plant Tissue Culture |
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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

Subtopic:  Animal Husbandry (OLD NCERT) |
 73%
From NCERT
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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

Subtopic:  Insect & Pest Resistance (OLD NCERT) |
 76%
From NCERT
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Meristem culture is especially important to obtain: 

(1) Drought resistant plants

(2) Virus free plants

(3) Biofortified plants

(4) Androgenic haploids

Subtopic:  Plant Tissue Culture |
 94%
From NCERT
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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

Subtopic:  Plant Breeding & Its Steps (OLD NCERT) |
 78%
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Please attempt this question first.

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

Subtopic:  Insect & Pest Resistance (OLD NCERT) |
 66%
From NCERT
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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

Subtopic:  Breeding for Disease Resistance (OLD NCERT) |
 85%
From NCERT
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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.

Subtopic:  Breeding for Disease Resistance (OLD NCERT) |
 51%
NEET - 2009
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Consider 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

Subtopic:  Breeding for Disease Resistance (OLD NCERT) |
NEET - 2008
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The crops engineered for glyphosate are resistant/tolerant to

(1) fungi

(2) bacteria

(3) insects

(4) herbicides

Subtopic:  Plant Breeding for Quality (OLD NCERT) |
NEET - 2015
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