Crop plants grown in monoculture are:
1. low in yield
2. free from intraspecific competition
3. characterised by poor root system
4. highly prone to pests
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTriticale, the first man-made cereal crop, has been obtained by crossing wheat with:
1. rye
2. pearl millete
3. sugarcane
4. barley
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn order to obtain virus-free plants through tissue culture the best method is:
1. protoplast culture
2. embryo culture
3. anther culture
4. meristem culture
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe name of the Indian scientist associated with Green Revolution in India is
1. H.G. Khorana
2. M.S.Swaminathan
3. Homi Bhaba
4. C.N.R. Rao.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPeople recovering from long illness are often advised to include the alga Spirulina in their
diet because it
1. makes the food easy to digest
2. is rich in proteins
3. has antibiotic properties
4. restores the intestinal microflora.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCattle fed with spoilt hay of sweet clover which contains dicumarol
1. are healthier due to a good diet
2. catch infections easily
3. may suffer vitamin K deficiency and prolonged bleeding
4. may suffer from beri beri due to deficiency of B vitamins
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySomaclonal variation can be obtained by
(1) application of colchicine
(2) irradiation with gamma rays
(3) tissue culture
(4) hybridisation.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySomaclonal variation appears in
(1) organisms produced through somatic hybridization
(2) plants growing in highly polluted conditions
(3) apomictic plants
(4) tissue culture raised plants.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the following table identify the correct matching of the crop, its disease and the corresponding pathogen.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySomaclonal variation is seen in
(1) tissue culture grown plants
(2) apomicts
(3) polyploids
(4) vegetatively propagated plants
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology