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Practice each question, then open the answer or worked solution.
Why is it easier to culture meristems compared to permanent tissues?
They divide and differentiate into a new plant, whereas the permanent tissues have lost the ability of division, so they cannot form a new plant.
Why are proteins synthesised from Spirulina called single-cell proteins?
A large amount of protein is produced in the single cell of spirulina within a short span which is rich in protein.
A person who is allergic to pulses was advised to take a capsule of Spirulina daily. Give the reasons for the advice.
A person who is allergic to pulses was advised to take a capsule of Spirulina daily because spirulina is rich in protein.
What is aquaculture? Give an example of an animal that can be multiplied by aquaculture.
Aquaculture is defined as the culture or farming of all aquatic plants and animals for economic use. The animals that can be multiplied by aquaculture are fishes, lobsters, crabs, molluscs etc.
What are the duties of a veterinary doctor in the management of a poultry farm?
They have to observe the behaviour of animals. They should give basic checkups at regular intervals. Vaccination is given a specific period. Doing necessary analysis and checking the meat and the eggs.
Would it be wrong to call plants obtained through micro-propagation as ‘clones’? Comment.
A clone is a living organism produced asexually from a single parent and is genetically identical to it. Hence, it will not be wrong to call plants obtained through micro-propagation as clones because the plant will be genetically identical to its parent.
How is a somatic hybrid different from a hybrid?
Somatic hybrid is formed by the fusion of any two organisms whereas hybrid is produced by the fusion of two different varieties or two different related species.
What is emasculation? Why and when is it done?
Emasculation is the process of removal of the male reproductive part (stamens) from the flower, usually a bisexual flower. It is done to make the flower completely female flower. It is done before the flowers attain maturity.
Discuss the two main limitations of a plant hybridization programme.
i. Availability of desirable traits
ii. Linking of the desirable trait to undesirable gene
Interspecific crosses are rare in nature and intergeneric crosses almost unknown. Why?
Two different male and female species are mated in the interspecific crossing. The so-formed progeny will be infertile. Thus the inter-specific cross is rare in nature. In inter-generic crossing, the crossing or mating is done between male and female of two different genera, which are completely impossible.