A: Mesozoic is the era of dinosaurs,but they | vedclass

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(A) The Mesozoic era is indeed known as the 'Age of Reptiles' or the era of dinosaurs. They dominated the earth during this period and suddenly disapp

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

Vedclass · Answer

(A) The Mesozoic era is indeed known as the 'Age of Reptiles' or the era of dinosaurs. They dominated the earth during this period and suddenly disappeared approximately $65$ million years ago.Scientific theories suggest that their extinction was likely caused by drastic climatic changes,such as the impact of a large asteroid or volcanic activity,which altered the environment significantly.While some evolutionary biologists propose that modern birds evolved from small theropod dinosaurs,this evolutionary transition is not the reason for their sudden mass extinction.Therefore,both the Assertion and the Reason are factually correct statements,and the Reason provides a plausible explanation for their disappearance.

Column $I$	Column $II$
$A$. Natural selection	$I$. Darwin's finches
$B$. Geographical isolation	$II$. Mule
$C$. Hybrid sterility	$III$. Cichlid fishes in Lake Victoria
$D$. Sympatric speciation	$IV$. Biston carbonaria

$A$: Mesozoic is the era of dinosaurs,but they suddenly disappeared from the earth.
$R$: Dinosaurs may have changed into birds or climatic changes killed them.

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$A$: Mesozoic is the era of dinosaurs,but they suddenly disappeared from the earth.$R$: Dinosaurs may have changed into birds or climatic changes killed them.