AP BIOLOGY

Detailed explanation-1: -Amphibians: The animals which can live both in water and on land are called Amphibians. Frogs, toads, salamanders, and newts are among the species that make up this category.

Detailed explanation-2: -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.

Detailed explanation-3: -Solution : Lobefins were the first animals to be declared as amphibians.

Detailed explanation-4: -Hint: Amphibians replaced gills with another respiratory organ, the lungs, in order to live on land. Other adaptations present include: skin that prevents loss of water, eyelids which allow adapting to vision outside the water.

Detailed explanation-5: -Amphibians are animals that have special adaptations and can live on both land and in water. Examples include the frog and salamander.