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प्रश्न
Only variations that confer an advantage to an individual organism will survive in a population. Do you agree with this statement? Why or why not?
उत्तर
We agree with the statement that Only variations that confer an advantage to an individual organism will survive in a population. All the variations do not have an equal chance of surviving in the environment in which they find themselves. The chances of surviving depend on the nature of variations. Different individual would have different kind of advantages. A bacteria that can withstand heat will survive better in a heat wave. Selection of variants by environmental factors forms the basis for revolutionary process.
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संबंधित प्रश्न
Explain the following:- Speciation
What factors could lead to the rise of a new species?
Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Why or why not?
The palisade cells of a species of plant contain 28 chromosomes. How many chromosomes will there be in each gamete produced by the plant?
(a) 56
(b) 28
(c) 14
(d) 4
Which of the following may be used to obtain an F2 generation?
(a) allowing flowers on a parent plant to be self-pollinated
(b) allowing flowers on an F1 plant to be self-pollinated
(c) cross-pollinating an F1 plant with a parent plant
(d) cross-pollinating two parent plants
What name is given to the sequence of gradual changes over millions of years in which new species are produced?
Choose the one term from the following which includes the other three :
broccoli, wild cabbage, cauliflower, cabbage
State the various factors which could lead to the formation of new species.
Does geographical isolation of individuals of a species lead to the formation of a new species? Provide a suitable explanation for your answer.
How are those species which are now 'extinct' studied?
