NCERT - Strategies for Environment and Food Production Questions and Answers of Class 12 Biology | Biology - Strategies for Environment and Food Production MCQs | NCERT Solution of Class 12 Biology Strategies for Environment and Food Production

Questions

1 "Jaya" and "Ratna" developed for green revolution in India are the varieties of

1 Bajra

2 Maize

3 Rice

4 Wheat

View Answer

Answer: Rice

2 A germplasm collection is a

1 Collection of specimens of all the species of an area in a herbarium or botanical garden

2 Collection of modern varieties of a crop

3 Collection of seeds or pollen of rare and threatened species of a group or area

4 Collection of seeds or pollen of rare and threatened species of a group or area

View Answer

Answer: Collection of plants or seeds having diverse alleles of all genes in a crop

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3 Somaclones are obtained by

1 Genetic engineering

2 Irradiation

3 Plant breeding

4 culture Tissue

View Answer

Answer: culture Tissue

4 Hybrid vigour is mostly due to

1 Homozygosity of pure characters

2 Superiority of all the genes

3 Heterozygosity

4 Mixing up of cytoplasm of the male with that of female

View Answer

Answer: Heterozygosity

5 The capacity to generate a whole plant from any cell/explants is called

1 Pluripotency

2 Cell cloning

3 Tissue culture

4 Totipotency

View Answer

Answer: Totipotency

6 The method of producing thousands of plants through tissue culture is called

1 Micropropagation

2 Somatic hybridization

3 Biofortification

4 Biomagnification

View Answer

Answer: Micropropagation

7 Desired improved varieties of economically useful crops are raised by

1 Hybridization

2 Mutation

3 Natural selection

4 Biofertilizer

View Answer

Answer: Hybridization

8 Aims of plant breeding are to produce

1 early maturing varieties

2 high-yielding varieties

3 disease-free varieties

4 all the above

View Answer

Answer: all the above

9 Main objective of production/use of herbicide resistant Genetically modified crops is to:

1 Reduce herbicide accumulation in food articles for health safety

2 Eliminate weeds from the field without the use of manual labor

3 Eliminate weeds from the field without the use of herbicides

4 Encourage eco-friendly herbicides

View Answer

Answer: Reduce herbicide accumulation in food articles for health safety

10 Plants having similar genotypes produced by plant breeding are called

1 Autopolyploid

2 Haploid

3 Clone

4 Genome

View Answer

Answer: Clone

11 Haploid plantlets can be produced by

1 Embryo culture

2 Cotyledon culture

3 Pollen culture

4 Meristem culture

View Answer

Answer: Pollen culture

12 Necrosis, or death of tissue particularly leaf tissue, is due to the deficiency of

1 N, K, S

2 N, K, Mg and Fe

3 Mn, Zn and Mo

4 Ca, Mg, Cu and K

View Answer

Answer: Ca, Mg, Cu and K

13 'Himgiri' developed by hybridisation and selection for disease resistance against rust pathogens is a variety of

1 Wheat

2 Chilli

3 Maize

4 Sugarcane

View Answer

Answer: Wheat

14 Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

1 Black rust of wheat

2 Bacterial leaf blight of rice

3 Downy mildew of grapes

4 Loose smut of wheat

View Answer

Answer: Downy mildew of grapes

15 The process to induce mutations artificially through use of chemicals or radiations is called

1 Ethylene

2 Infra Red Radiations

3 Gamma Radiations

4 None of these

View Answer

Answer: Gamma Radiations

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