Crop plants grown in monoculture are:
low in yield
free from intraspecific competition
characterised by poor root system
highly prone to pests
Continued inbreeding can cause inbreeding depression. Whenever, this becomes a problem, selected animal of the breeding population should be mated with:
related superior animals of same breed
related superior animals of diffrent breed
unrelated superior animals of same breed
unrelated superior animals of different breed
The best plant explant to raise virus free plant is:
embryo
vessels
meristem
Leaf
The agriculture practice of breeding and raising livestock is called as:
Domestication
Breeding
Animal husbandry
Bio-fortification
Consider the following two statements:
I. In spite of having more than 70 per cent of the world livestock population, the contribution of india and china to the world farm produce is only 25 per cent.
II. The productivity per unit of cattle in these countries is very low.
Both I and II are true and II explains I
Both I and II are true but II does not explain I
I is true but II is false
Both the statements are not true
The management of animals for milk and its products for human consumption is called as:-
Which of the following is the most important factor that would lead to increased milk yield in cattle ?
Selection of good breeds
Resistance to diseases
Stringent cleanliness and hygiene
Provision of ideal environmental conditions to cattle
Amongst the following the number of fresh water fishes is:
Catla, Rohu, Common carp, Hilsa, Sardines, Mackerel, Pomfrets
2
3
4
5
A group of animals related by descent and similar in most characters like general appearance, features, size, configuration, etc., are said to belong to a:
Variety
Species
Strain
Breed
The purposeful manipulation of plant species in order to create desired plant types that are better suited for cultivation, give better yields and are disease resistant is called:
Genetic farming
Phytoremediation
r DNA technology
Hisardale is a new breed of:
Sheep developed by crossing Bikaneri ewes and Marino rams.
Sheep developed by crossing Bikaneri rams and Marino ewes.
Goat developed by crossing Bikaneri ewes and Marino rams.
Goat developed by crossing Bikaneri rams and Marino ewes.
Today, all our major food crops are derived from:
Wild varieties
Domesticated varieties
Genetically modified varieties
Plant tissue culture
There are several species of honeybees which can be reared. Of these the species reared in india is:
Apis indica
Apis dorsata
Trigona iridipennis
Apis mellifera
I. An effective germplasm collection is the prerequisite of any successful plant breeding program.
II. Genetic variability is the root of any breeding program.
Both I and II are true and II dose not explains I
I is false but II is true
Arrange the following steps of a plant breeding program in a correct chronological manner:
I. Selection and testing of superior recombinants
II. Collection of variability
III. Crosshybridization among the selected parents
IV. Evaluation and selection of parents
V. Testing, release and commercialization of new cultivars
II, IV, I, III, V
IV, I, II, III, V
II. IV, III, I, V
IV, III, II, I, V
The best breeding method for animals that are below average in produtivity in milk production would be:
Inbreeding
Out-crossing
Cross-breeding
Interspecific hybridisation
Identify the option where all columns are not correctly matched:
Crop Variety Resistant to
Wheat Himgiri Leaf rust
Brassica Pusa Swarnim White rust
Cowpea Pusa komal Black rot
Chilli Pusa sadabahar Leaf curl
In mung bean the resistance to yellow mosaic virus and powdery mildew were introduced by:
Mutations
Hybridization
Tissue culture
Genetic engineering
Pusa Shubhra, an improved variety of cauliflower, is resistant to:
White rust
Bacterial blight
Black rot
Leaf curl
To obtain a virus free plant, what can be used as an explant in micropropogation ?
Apical meristem
Axillary meristem
Either apical or axillary meristem
Embryo
In plants, somatic embryo regeneration is induced usually by a relatively high concentration of:
Benzyl amino purine
IAA
2,4 - D
NAA
Inbreeding depression in animals can be overcome by:
A single outcross
Out cross for many generations
Inter-specific hybridization
Identify the incorrectly matched pair:
Crop Variety
Resistant to
1.
Himgiri
Leaf and stripe rust
2.
Karan rai
3.
Pusa sadabahar
4.
Pusa shubhra
Meristem culture is especially important to obtain:
Drought resistant plants
Virus free plants
Biofortified plants
Androgenic haploids
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?
I and II only
I and III only
II and III only
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 2 3 4
2 1 4 3
2 1 3 4
1 2 4 3
Which one is the wrong pairing for the disease and its causal organism?
late blight of potato-Alternaria solani
Black rust of wheat-Puccinia graminis
Loose smut of wheat-Ustilago nuda
Root-knot of vegetables-Meloidogyne sp.
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?
B and C
A and B
C and D
B and D
The crops engineered for glyphosate are resistant/tolerant to
fungi
bacteria
insects
herbicides
Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
Bacterial leaf blight of rice
Downy mildew of grapes
Loose smut of wheat
Black rust of wheat
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