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Plant Breeding Free Doubts and Solutions

CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

what is osmosis

Asked by srivastavsanjana6 18th January 2018, 1:36 PM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

bilogical concept of specious is based on

Asked by Rahees 3rd July 2016, 12:10 PM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

Out crossing and cross breeding are 2 breeding practices in animal husbandry. How are the 2 practices differrent from each other and what advantages are they to breeders? Explain.

Asked by subratabanerjee686 19th November 2015, 10:23 PM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

Give stratagy that is adopted for developing desease resistance to insects and pests
 

Asked by Gayathri manat 26th July 2015, 2:16 PM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

(i) What is plant breeding? List the two steps which classical plant breeding involves. (ii) How has mutation breeding helped in improving crop varieties? Give one example where this technique has helped. (iii) How has the breeding programme helped in improving public nutritional health? State two examples in support of your answer.

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

Explain the process of emasculation and bagging of flowers. State their importance in breeding experiments.

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

Scientists have succeeded in recovering healthy sugarcane plants from a diseased one. (a) Name the part of the plant used as explants by scientists. (b) Describe the procedure which scientists follow to recover healthy plants. (c) Name the technology used for crop improvement.          

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

IARI has released several varieties of crop plants which are biofortified. Give three examples of such crops and their biofortification.

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

(i) What are the features of plants which will prevent insect and pest infestation? (ii) Name a man-made cereal and where it is used.

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

(i) Give two important contributions of Dr M. S. Swaminathan. (ii) Interspecific crosses are rare in nature and intergeneric crosses are almost unknown. Why?

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

What is interspecific hybridisation? Give one example of a crop in which it is practised and mention one advantage derived from it. 

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

What is inbreeding in plants? What happens to the recessive alleles in this process? 

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

(i) Name the chemical used for doubling the chromosome number. (ii) Name the improved variety of wheat which was developed through hybridisation that took 12 years.

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

Why does the pure line represent the progeny of homozygous plants?

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

State any one significance of interspecific hybridisation in plants.

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

State the importance of biofortification. 

Asked by Topperlearning User 12th June 2014, 11:10 AM
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CBSE - XII Science - Biology - Strategies for Enhancement in Food Production

How can pollen grains of wheat and rice which tend to lose viability within 30 minutes of their release be made available months later for breeding programmes? 

Asked by Topperlearning User 12th June 2014, 11:10 AM
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