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प्रश्न
How did Darwin explain fitness of organisms?
उत्तर
Organisms struggle for food, space, and mate. As these become a limiting factor, competition exists among the members of the population. Darwin denoted struggle for existence in three ways.
The intra-specific struggle between the same species for food, space, and mate Inter-specific struggle with different species for food and space.
Struggle with the environment to cope with the climatic variations, flood, earthquakes, and drought, etc.
According to Darwin, nature is the most powerful selective force. He compared the origin of species by natural selection to a small isolated group. Darwin believed that the struggle for existence resulted in the survival of the fittest. Such organisms become better adapted to the changing environment.
संबंधित प्रश्न
Who published the book “Origin of species by Natural Selection” in 1859?
Which of the following was the contribution of Hugo de Vries?
The phenomenon of “Industrial Melanism” demonstrates ____________.
Darwin’s finches are an excellent example of ____________.
Who proposed the Germplasm theory?
Mention the main objections to Darwinism.
Taking the example of Peppered moth, explain the action of natural selection. What do you call the above phenomenon?
Darwin's finches and Australian marsupials are suitable examples of adaptive radiation - Justify the statement.
Who disproved Lamarck’s Theory of acquired characters? How?
How does Mutation theory of De Vries differ from Lamarck and Darwin’s view in the origin of new species.
Mention the main objections to Darwinism.
