NEET BIOLOGY

Detailed explanation-1: -Amphibians are ectothermic or cold-blooded animals that can live on land as well as in water. They have gills as well as lungs. They use gills to breathe in the water and lungs to breathe on the land. The larval stage of amphibians is spent inside water and adulthood on land.

Detailed explanation-2: -Answer and Explanation: Most adult amphibians breathe through both their lungs and through their skin. As young, most amphibians live underwater like fish and use gills to breathe. However, some salamanders remain in the aquatic stage as adults and always use gills for breathing.

Detailed explanation-3: -The lungs of amphibians are simple saclike structures that internally lack the complex spongy appearance of the lungs of birds and mammals. The lungs of most amphibians receive a large proportion of the total blood flow from the heart.

Detailed explanation-4: -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-5: -Tadpoles and some aquatic amphibians have gills like fish that they use to breathe.