A: Evolution of shelled eggs helped the repti | vedclass

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(C) Assertion is true because reptiles are the first successful land vertebrates,and the formation of a protective shell around the eggs prevented des

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Assertion is correct,but Reason is incorrect.

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(C) Assertion is true because reptiles are the first successful land vertebrates,and the formation of a protective shell around the eggs prevented desiccation,helping them adapt to terrestrial life.Reason is incorrect because viviparity (giving birth to live young) is a reproductive strategy that has appeared independently in various lineages,including some lower animals and sharks,which existed long before the evolution of amniotic shelled eggs in reptiles.

$A$: Evolution of shelled eggs helped the reptiles to successfully adapt for terrestrial life.
$R$: The origin of shelled eggs occurred earlier than viviparity.

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$A$: Evolution of shelled eggs helped the reptiles to successfully adapt for terrestrial life.$R$: The origin of shelled eggs occurred earlier than viviparity.