AP 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.

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: -The word “amphibian” is derived from the Greek term “amphibios” (amphi = dual or both, bios = life). Frog is thus, called an amphibian because it typically lives on land but requires water for fertilisation and development.

Detailed explanation-4: -Amphibians are frogs, toads, newts and salamanders. Most amphibians have complex life cycles with time on land and in the water. Their skin must stay moist to absorb oxygen and therefore lacks scales.

Detailed explanation-5: -Amphibians are vertebrates (animals with backbones) which are able, when adult, to live both in water and on land. Unlike fish, they can breathe atmospheric oxygen through lungs, and they differ from reptiles in that they have soft, moist, usually scale-less skin, and have to breed in water.