18488.Norman Borlaug the 'Father of Green Revolution' has developed a highly recognized and appreciated cultivating variety of ______.
Wheat
Rice
Onion
Sugarcane
18489.Which one of the following helps in absorption of phosphorus from soil by plants?
Anabaena
Glomus
Rhizobium
Frankia
18490.A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this?
(a) Lots of urea and phosphate fertilizer were used in the crops in the vicinity
(b) The area was sprayed with DDT by an aircraft
(c) The lake water turned green and stinky
(d) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.
Which two of the above were the main causes of fish mortality in the lake?
a, b
b, c
c, d
a, c
18491.Selection of homozygous plant is
Mixed selection
Mass selection
Pure line selection
none of these
18492.Necrosis, or death of tissue particularly leaf tissue, is due to the deficiency of
N, K, S
N, K, Mg and Fe
Mn, Zn and Mo
Ca, Mg, Cu and K
18493.An organism used as biofertilizer for raising soybean crop is
Nostoc
Azotobacter
Azospirillum
Rhizobium
18494.Plants having similar genotypes produced by plant breeding are called
Autopolyploid
Haploid
Clone
Genome
18495.In tissue culture medium, the embryoids formed from pollen grains is due to
Double fertilization
Organogenesis
Cellular totipotency
Test tube culture
18496.Which of the following is free living aerobic and nonphotosynthetic nitrogen fixing bacterium?
Rhizobium
Nostoc
Azospirillum
Azotobacter
18497.Haploid plantlets can be produced by
Embryo culture
Pollen culture
Cotyledon culture
Meristem culture
18500.Pure line breeds refer to
Heterozygosity
Homozygosity only
Homozygosity and independent assortment
Heterozygosity and linkage
18501.The capacity to generate a whole plant from any cell/explants is called
Pluripotency
Cell cloning
Tissue culture
Totipotency
18502.Which one of the following scientist's names is correctly matched with the theory put forth by him?
Mendel – Theory of Pangenesis
Weismann – Theory of continuity of Germplasm
Pasteur – Inheritance of acquired characters
de Vries – Natural selection
18503.Which one of the following pair is incorrectly matched in respect to the "crop varieties for disease resistance"?
Cowpea - Bacterial blight
Brassica - White rust
Wheat - Leaf and stripe rust
Cauliflower - Tobacco mosaic virus and leaf curl
18504."Jaya" and "Ratna" developed for green revolution in India are the varieties of
Bajra
Maize
Rice
Wheat
18505.The entire collections of plants/seeds having all diverse alleles for all the genes of a crop is called
Germplasm
Herbarium
Genome
Gene library
18506.A large proportion of cultivated plants are _______.
Aneuploids
Allopolyploids
Autopolyploids
Haploids
18507.The method of producing thousands of plants through tissue culture is called
Micropropagation
Somatic hybridization
Biofortification
Biomagnification
18508.Fishes reared in culture fishery in India are
Salmon and Rohu
Salmon and Catla
Catla ad Magur
Rohu and Catla
18511.Which one of the following is commonly used in transfer of foreign DNA into crop plants?
Penicillium expansum
Trichoderma harzianum
Meloidogyne incognita
Agrobacterium tumefaciens
18512.Breeding crops with higher levels of minerals, vitamins or higher protein and healthier fats is called
Micropropagation
Somatic hybridization
Biofortification
Biomagnification
18513.Mycorrhiza is symbiotic association between
Fungus and gymnosperm stem
Fungus with angiosperm leaves
Fungus with legume fruits
Fungus with Gymnosperm and angiosperm roots
18515.The superiority of the hybrid over either parent in one or more traits is
Transformation
Heterosis
Metamorphosis
None of these
18516. Himgiri developed by hybridisation and selection for disease resistance against rust pathogens is a variety of
Wheat
Chilli
Maize
Sugarcane
18517.Which of the followings is correctly matched?
Apiculture - Honey bee
Pisciculture - Silk moth
Sericulture - Fish
Aquaculture - mosquitoes
18518.The process to induce mutations artificially through use of chemicals or radiations is called
Ethylene
Infra Red Radiations
Gamma Radiations
None of these
18519.A transgenic food crop which may help in solving the problem of night blindness in developing countries is
Golden rice
Flavr Savr tomatoes
Starlink maize
Bt Soybean
18520.Main objective of production/use of herbicide resistant Genetically modified crops is to:
Reduce herbicide accumulation in food articles for health safety
Eliminate weeds from the field without the use of manual labor
Eliminate weeds from the field without the use of herbicides
Encourage eco-friendly herbicides
18521.Crosses between two plants by the same variety are called
Intravarietal
Intervarietal
Interspecific
Intergeneric
18522.Hybrid vigour is mostly due to
Homozygosity of pure characters
Superiority of all the genes
Heterozygosity
Mixing up of cytoplasm of the male with that of female
18523.Heterosis means
Pollen sterility
Pollen-pistil incompatibility
Hybrid vigour
Hybrid compatibility
18525.In which crops is the method of mass selection applied
Cross-pollinated
Self-pollinated
Both self and cross-pollinated
Potato and sugarcane
18526.In order to obtain disease-free plants through tissue culture techniques, the best method is
Protoplast culture
Anther culture
Embryo rescue
Meristem culture
18528.Consider the following statements (A-D) about organic farming
(A) Utilizes genetically modified crops like Bt cotton
(B) Uses only naturally produced inputs like compost
(C) Does not use pesticides and urea
(D) Produces vegetables rich in vitamins and minerals
Which of the above statements are correct?
(B) and (C) only
(A) and (B) only
(B), (C) and (D)
(C) and (D) only
18530.A germplasm collection is a
Collection of specimens of all the species of an area in a herbarium or botanical garden
Collection of modern varieties of a crop
Collection of plants or seeds having diverse alleles of all genes in a crop
Collection of seeds or pollen of rare and threatened species of a group or area
18531.Desired improved varieties of economically useful crops are raised by
Mutation
Hybridization
Natural selection
Biofertilizer
18532.Aims of plant breeding are to produce
early maturing varieties
high-yielding varieties
disease-free varieties
all the above
18533.Covering of spawned compost with a situable material is called
Composting
Spawning
casing
Cropping
18536.Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
Black rust of wheat
Bacterial leaf blight of rice
Downy mildew of grapes
Loose smut of wheat
18537.Cloning is meant for
Production of HGH gene in E. coli.
To preserve the genotype of organism
To replace the original one
all of these