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प्रश्न
Write a short note based on the information known to you.
Darwin’s theory of natural selection.
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उत्तर
- Darwin is famous for the theory which he published in the book titled ‘Origin of Species’.
- Darwin’s theory of natural selection is based on the concept of survival of the fittest.
- Organisms can reproduce prolifically.
- Under limited resources, organisms compete with one another in a life-threatening manner for survival.
- According to this theory, only those organisms survive which show modifications for winning the competition. The selected organisms then give rise to new species with their specific set of characters.
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संबंधित प्रश्न
All organisms produce more young ones. Comment
Industrial melanism provides a good example of natural selection. Discuss.
List any three drawbacks of Darwinism.
Explain the evolution of the long neck of giraffe according to Charles Darwin.
What are objections raised against Darwin's theory?
The theory of natural selection for evolution was proposed by ______.
What is the ancient name for all human beings?
Which of the following sequences fits into the organic evolution theory proposed by Charles Darwin and Alfred Wallace?
Which one of the following statement is correct?
Species occurring in the different geographical areas are called as ______.
Match List - I with List - II.
| List - I | List II | ||
| (a) | Adaptive radiation | (i) | Selection of resistant varieties due to excessive use of herbicides and pesticides |
| (b) | Convergent evolution | (ii) | Bones of forelimbs in Man and Whale |
| (c) | Divergent evolution | (iii) | Wings of Butterfly and Bird |
| (d) | Evolution by anthropo- genic action | (iv) | Darwin Finches |
Choose the correct answer from the options given below.
Who proposed the theory of survival of the fittest?
The famous book "The Origin of Species" was written by ______.
Mention four main postulates of Darwin's theory.
Define the following term:
Natural selection
Match the name of the scientist in Column I with the name of the theory in Column II.
| Column (I) | Column (II) | ||
|---|---|---|---|
| i. | August Weisman | a. | Theory of origin of species |
| ii. | Hugo de Vries | b. | Theory of chemical evolution |
| iii. | Charles Darwin | c. | Theory of continuity of germplasm |
| iv. | Oparin Haldane | d. | Mutation theory |
Choose the correct option.
DDT resistant mosquitoes and different break sizes of African seed cracker finches show ______ type of selection respectively.
The theory of natural selection (Darwinism) was proposed by:
