NEET BIOLOGY

Detailed explanation-1: -Amphibians are a group of vertebrates that has adapted to live in both water and on land. Frogs, toads, salamanders, newts, and caecilians are all types of amphibians. Amphibian larvae are born and live in water, and they breathe using gills.

Detailed explanation-2: -Amphibians are a class of cold-blooded vertebrates made up of frogs, toads, salamanders, newts, and caecilians (wormlike animals with poorly developed eyes).

Detailed explanation-3: -Amphibian eggs can be laid in the water (top) or on land in moist environments (bottom). All frogs and some salamanders in Pennsylvania lay their eggs in water. Salamanders that lay their eggs on land often guard them from predators, like this red-backed salamander.

Detailed explanation-4: -Amphibian Eggs Unlike other tetrapod vertebrates (reptiles, birds, and mammals), amphibians do not produce amniotic eggs. Therefore, they must lay their eggs in water so they won’t dry out. Their eggs are usually covered in a jelly-like substance, like the frog eggs shown in Figure below.

Detailed explanation-5: -The larvae of most amphibians have gills and look like fish when they are born. They go through metamorphosis and grow four legs and develop air-breathing lungs when they become adults. Toads, frogs, salamanders, and newts are all amphibians.