A : Species is a genetically closed system.R | vedclass

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(A) species is defined as a group of organisms that can interbreed under natural conditions and produce fertile offspring. Reproductive isolation acts

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Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

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(A) species is defined as a group of organisms that can interbreed under natural conditions and produce fertile offspring. Reproductive isolation acts as a biological barrier that prevents members of different species from interbreeding. Because gene flow between different species is restricted by this isolation,a species functions as a genetically closed system. Therefore,the Reason correctly explains why the Assertion is true.

$A :$ Species is a genetically closed system.
$R :$ Because the reproductive isolation constitutes the most important boundary between different species.

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$A :$ Species is a genetically closed system.$R :$ Because the reproductive isolation constitutes the most important boundary between different species.