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Earn 100

Struggle for existence results when there is an
(a)explosive increase of population.
(b)explosive increase in the means of subsistence.
(c)explosive increase in population and limited increase in the means of subsistence.
(d)explosive increase both in population and means of subsistence.

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Important Questions on Origin and Evolution of Life
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According to Darwin, the variations are produced by

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With respect to specific environment, variations for survival displayed by resident organisms are

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If population of organisms is introduced into a new territory where environmental conditions are favourable, the population grows rapidly, because

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Deficiency in Charles Darwin's 'Theory of Evolution' was a failure to explain how

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Chief agent of evolution is

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What is not true about mutations?

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What is the exact process of organic evolution?

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'Gene pool' is the sum total of genes present in
