Q.
Two different species cannot live for long duration in the same niche or habitat. This law is :-
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AIPMTAIPMT 2002Organisms and Populations
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Solution:
Interspecific competition is rivalry amongst members of different species. The severity of competition depends upon similarity in the requirement food and shelter. Every type of organism has a ticular niche, no two organisms can live in same One of the two is eliminated. This phenomenon 'id Gause hypothesis of competitive exclusion. Different organisms develop different types of variations in order to exploit niches, e.g. species of Finches in Galapagos Islands. Allen's law states that there is tendency of smaller extremities like ear, nose, tail etc. in animals living in colder climate. Weisman's germplasm theory was the ultimate blow to discard lamarckism. Dollo's law proposed that evolution is irreversible.