Tag: improvement in food resources

Questions Related to improvement in food resources

.......... is a sterile hybrid which spreads by rhizome division

biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

  1. Iris albicans

  2. Evening primrose

  3. Tangelo

  4. None of the above

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Correct Option: A
Explanation:

Hybrid plants can be developed by the breeding of the plants of different species. The parents are genetically different plants. Iris albicans is the sterile hybrid which is developed by breeding of two different species. This is known as interspecific hybridization. This is a sterile plant which spreads by rhizome division.

Thus, the correct answer is option A. 

Which of the following is not applicable to biological species concept?

biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

  1. Hybridisation

  2. Reproductive isolation

  3. Natural selection

  4. Gene pool

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Correct Option: A
Explanation:

Answer is option A i.e. "Hybridisation"
The biological species concept defines a species as members of populations that interbreed in nature. According to this concept, organisms belong to the same species if they can interbreed to produce viable, fertile offspring. Reproductive isolation, natural selection and gene pool are applicable to one species.
Hybridisation, on contrary, occurs due to process of combining two different species of organisms to create a hybrid.
Hence, "hybridisation" is not applicable to biological species concept.

Total number of meiotic division required for forming $100$ zygotes/ $100$ grains of wheat is?

biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

  1. $100$

  2. $75$

  3. $125$

  4. $50$

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Correct Option: C

Amber coloured Wheat produced from red coloured Mexican Wheat is

biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

  1. Sharbati Sonora

  2. Pusa Lerma

  3. Both A and B

  4. Tanchung Native I.

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Correct Option: C

Pulses usually lack amino acids

biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

  1. Methionine and tryptophan

  2. Cysteine and methionine

  3. Cysteine and tryptophan

  4. Methionine and tryptophan.

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Correct Option: B

Purity of seed is guaranteed by

biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

  1. ICAR

  2. NBPGR

  3. National Seed Corporation

  4. All the above.

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Correct Option: C

Assertion : Paraguay tea is obtained from Paullinia cupana

Reason :Tea is obtained from Camellia sinensis

biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

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Correct Option: E
Explanation:

Paraguay tea is obtained from leaves of evergreen tree Ilex paraguariensis. 

All the leaves are used. Tea is obtained from the leaves of Camellia sinensis of family Theaceae. 
So, the correct answer is 'If the assertion is false but reason is true'

Which of the following is an introduced variety of crop

biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

  1. Soya Bean

  2. Sonora-64

  3. Tanchung native-1

  4. All the above.

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Correct Option: D

The evolution of cultivated cotton is an example of _______________.

biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

  1. Distant hybridization and polyploidy

  2. Diploidization of sterile $F _1$

  3. lntergeneric hybridization and polyploidy

  4. Interspecific hybridization and polyploidy

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Correct Option: A

In crop improvement programmes, haploids are of  great importance because they ___________________.

biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

  1. Grow better even under adverse climatic conditions

  2. Are useful in studies of meiosis.

  3. Have less requirement for energy inputs

  4. Give homozygous lines following diploidization

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Correct Option: A