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प्रश्न
Write short notes based upon 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 each other in a life-threatening manner for their 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
State the two key concept of Darwinian theory.
Name and define the three types of natural selection.
The theory of Natural Selection was proposed by
Industrial melanism provides a good example of natural selection. Discuss.
List any three drawbacks of Darwinism.
Answer the following question.
Explain ‘fitness of a species’’ as mentioned by Darwin.
In which book Darwin had published his theory of Natural selection?
Natural selection is called ‘survival of the fittest. Which of the following statements best describes an organism?
Wild cabbage has evolved into new varieties like cabbage, broccoli, and cauliflower by ______
If the fossil of an organism is found in the deeper layers of earth, then we can predict that
Origin of species was written by:
Theory of natural selection dwells on:
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.
What are the key concepts in the evolution theory of Darwin?
Nature has a way of causing organisms that inherit advantageous traits to survive and reproduce more successfully than the ones that do not. This process is known as ______.
Mention Darwin's observations made on finches during his visit of Galapagos Islands. Write the explanation given by Darwin on his observations.
The selective agent that was responsible for causing the change in peppered moth was ______.
Define the following term:
Speciation
