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Two species evolve in such a close relationship with each other that the evolution of one...

Two species evolve in such a close relationship with each other that the evolution of one species affects the evolution of the other species. This is called (A) adaptive radiation (B) coevolution (C) convergent evolution (D) gradualism. pls help

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Ans- (B) CO-EVOLUTION *

EXPLANATION :

(A) ADAPTIVE RADIATION : The process of evolution of different species in a given geographical area starting from a point and literally radiating to other areas of geography (habitats) is called adaptive radiation.

Ex..Darwin Finches and Australian Marsupials

* (B) CO EVOLUTION : When two species reciprocally affect each others evolution then the term co-evolution is used to describe this situation. These two species evolve in close relationship with each other.

Ex...Prey and predator species - if a prey evolves ,then it is must for the predator to evolve for its existence.

-Mutual and Competitive species are also examples of co-evolving species.

(C) CONVERGENT EVOLUTION : Convergent evolution is said to occur when different structures or species develop similar adaptive features due to similar habitats...

Ex..Wings of birds and bats(similar in function different in origin).

(D) GRADUALISM : Gradualism is a hypothesis that states that evolution proceeds mainly by accumulation of gradual changes.

It is the idea that evolutionary change happens slowly and in small steps.

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