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प्रश्न
Explain the evolution of the long neck of giraffe according to Charles Darwin.
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उत्तर
Darwin explained the evolution of the long neck of modem Giraffe by presuming the existence of variability in length of neck and legs in the ancestral population of Giraffe. Long-necked giraffe with long forelegs was more successful in reaching soft leaves of trees for feeding. Therefore, natural selection favored long neck progeny generation after generation.
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संबंधित प्रश्न
State Darwin’s theory of evolution.
Select the correct statement.
Which of the following sequences fits into the organic evolution theory proposed by Charles Darwin and Alfred Wallace?
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.
The selective agent that was responsible for causing the change in peppered moth was ______.
Industrial melanism was highlighted by ______.
Mention four main postulates of Darwin's theory.
Define the following term:
Speciation
Darwin's views on organic evolution were heavily shaped by which work of Thomas R. Malthus?
