Pebrine in silkworms is caused by:-
(a) Dugesia
(b) Monocystis
(c) Nosema
(d) Plasmodium

Concept Questions :-

Animal Husbandry
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Which of the following is not true for inbreeding?

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

(b) It always increases the productivity.

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

(d) It leads to homozygosity.

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

(a) differentiation

(b) re-differentiation

(c) de-differentiation

(d) re-juvenation.

Concept Questions :-

Plant Tissue Culture
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Match Column - 1 with Column - II and select the correct option from given codes.
Column I                               Column - II
A. Brassica                           (i) Himgiri
B. Okra                                (ii) Pusa Komal
C. Wheat                              (iii) Pusa Gaurav
D. Cowpea                            (iv) Pusa Sawani

(a) A- (iii), B- (iV), C- (i), D- (ii)

(b) A- (i), B- (iii), C- (ii), D- (iv)

(c) A- (iv), B- (iii), C- (i), D- (ii)

(d) A- (ii), B- (iv), C- (i), D- (iii)

Concept Questions :-

Breeding for Disease Resistance
Insect & Pest Resistance
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The number of chromosomes present in the cells of the bread wheat, Triticum aestivum suggests that it is

(a) hexaploid

(b) diploid

(c) tetraploid

(d) pentaploid

Concept Questions :-

Impact:Green Revolution
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Which one of the following methods is commonly used to maintain the genetic traits of a given plant ?

(a) By propogating through seed germination

(b) By propogating through vegetative multiplication

(c) By generating hybrids through intergeneric pollination

(d) By treating the seeds with gamma radiations 

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Identify the correct matches for crops and their improved varities

     Crops                  Varities                      Disease

(a) Wheat                Karan rai                    White rust

(b) Cauliflower        Pusa Shubhna              Leaf and stripe rust

(c) Cowpea              Pusa Koma                 Hill bunt

(d) Chill                 Pusa Sadabahar            Tobacco mosaic virus and leaf curl

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In callus culture, shoots can be included by the supply of

(a) auxin and no cytokinin

(b) higher concentration of auxin and lower concentration of cytokinin

(c) Higher concentration of cytokinin and lower concentration of auxin

(d) Both auxin and cytokinin in equal amounts

Concept Questions :-

Plant Tissue Culture
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Pollorum disease in fowls is caused by

(a) Salmonella

(b) Clostridium

(c) Hemophilus

(d) Mycobacterium

Concept Questions :-

Animal Husbandry
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One of these protozoans is threat to apiculture and sericulture

(a) Eimeria

(b) Ceratium

(c) Nosema

(d) Monocystis

Concept Questions :-

Animal Husbandry
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Difficulty Level: