NEET 2003 Biology question

Which one of the following sequences was proposed by Darwin and Wallace for organic evolution : -

(1)Overproduction, variations, constancy of population size, natural selection
(2)Variations, constancy of population size, overproduction, natural selection
(3)Overproduction, constancy of population size, variations, natural selectionCorrect
(4)Variations, natural selection, overproduction, constancy of population size

Answer: (3)

Solution

The logical sequence of Darwin-Wallace theory is: (i) populations have a very high reproductive capacity, i.e. overproduction; (ii) yet the population size remains more or less constant, which leads to struggle for existence; (iii) individuals show heritable variations; (iv) the

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Question ID VK-089239