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प्रश्न
Answer the following question in ‘One’ sentence only:
Define ‘mutation breeding’.
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उत्तर
Mutation breeding, sometimes referred to as “variation breeding”, is the process of exposing seeds to chemicals or radiation in order to generate mutants with desirable traits to be bred with other cultivars.
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संबंधित प्रश्न
Explain the concept ‘survival of the fittest’.
Explain the following:- Natural Selection
Insects, octopus, planaria and vertebrates possess eyes. Can we group these animals together on the basis of eyes that they possess ? Justify your answer giving reason.
What is meant by dominant genes and recessive genes? Give one example of each.
Explain how, characteristics (or traits) are inherited through genes.
A black mouse mates with a brown mouse, and all the offsprings are black.
(a) Why are no brown offsprings produced?
(b) If two of the black offsprings mate with each other what kind of offspring would you expect and in what proportions? Give reason for your answer.
Out of the wing of a bird, wing of an insect and the wing of a bat :
which two are homologous organs?
Match the terms given in column I with those given in column II :
| Column I | Column II |
| (1) Fossil | (a) A famous evolutionist |
| (2) A theory of evolution | (b) Survival of the fittest |
| (3) Probable ancestor of birds | (c) Petrified remains of prehistoric life |
| (4) Charles Darwin | (d) Father of genetics |
| (5) Gregor Mendel | (e) Archaeopteryx |
In what way are homologous organs evidence for evolution?
Define Organic evolution.
