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Theory of Natural Selection

According to ...

Question

According to Darwin, the organic evolution is due to

A

Interspecific competition

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B

Competition within closely related species

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C

Reduced feeding efficiency in one species, due to the presence of interfering species

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D

Intraspecific competition

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Solution

The correct option is B Interspecific competition
Interspecific competition is the competition among the different species for food shelter causes organic evolution, given by Darwin. Whereas intraspecific competition is the competition among the member of the same species. If there will be competition within the closely related species then evolution does not occur. The reduced feeding efficiency in one species due to the presence of interfering species is because of the struggle for existence.

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I)Intraspecific competition is a potent force in the process of organic evolution.
II)Feeding efficiency of one species might be increased due to interfering and inhibitory presence of the other species, even the resources are abundant.
III)Fitness of one species is significantly lower in the presence of another species.
IV)when the resources are limited, the competitively superior species will eliminate the other species.

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Q. Read the following statements (A - D) related to competition and select the correct option stating true (T) and false (F).

A. In a habitat with limited resources, the competitively superior organism will eliminate the inferior organism.
B. The Abingdon tortoise in Galapagos island became extinct due to the greater grazing efficiency of goats.
C. In interference competition, the competition between organisms is indirect.
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