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(D) Reptiles were the first vertebrates to become fully adapted to life on land. The key evolutionary innovation that allowed them to dominate the ter

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Large eggs

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(D) Reptiles were the first vertebrates to become fully adapted to life on land. The key evolutionary innovation that allowed them to dominate the terrestrial environment for $100$ million years was the development of the amniotic egg. These eggs have a protective shell that prevents desiccation (drying out) and allows the embryo to develop in a self-contained aquatic environment,independent of external water sources. This adaptation freed reptiles from the necessity of returning to water for reproduction,unlike amphibians.

Column-$I$	Column-$II$
$A.$ $500$ million years ago	$1.$ Sea weeds and few plants
$B.$ $350$ million years ago	$2.$ Jawless fishes
$C.$ $320$ million years ago	$3.$ Invertebrates

List $I$	List $II$
$A$. Mesozoic Era	$I$. Lower invertebrates
$B$. Proterozoic Era	$II$. Fish and Amphibia
$C$. Cenozoic Era	$III$. Birds and Reptiles
$D$. Paleozoic Era	$IV$. Mammals

The feature which enabled reptiles to dominate the land fauna for $100$ million years was their

Similar Questions

Birds are evolved from:

Match the following columns.
Column-$I$ Column-$II$
$A.$ $500$ million years ago $1.$ Sea weeds and few plants
$B.$ $350$ million years ago $2.$ Jawless fishes
$C.$ $320$ million years ago $3.$ Invertebrates

Match List $I$ with List $II$:
List $I$ List $II$
$A$. Mesozoic Era $I$. Lower invertebrates
$B$. Proterozoic Era $II$. Fish and Amphibia
$C$. Cenozoic Era $III$. Birds and Reptiles
$D$. Paleozoic Era $IV$. Mammals

Choose the correct answer from the options given below:

Fish with stout and strong fins could move on land and go back to water. This occurred about ....... million years ago.

The mammals evolved from the reptiles in the:

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