EVERYDAY SCIENCE

Detailed explanation-1: -Fishes, amphibians, reptiles, birds and mammals constitute in the same category, called phylum (chordata).

Detailed explanation-2: -Most species within the phylum Chordata are vertebrates, or animals with backbones (subphylum Vertebrata). Examples of vertebrate chordates include fishes, amphibians, reptiles, birds, and mammals. A modern human-one species of mammal-is a familiar example of a chordate.

Detailed explanation-3: -The simple answer is that amphibians are classified as chordates because all vertebrate animals are part of the Chordata phylum. However, not all chordates are vertebrates.

Detailed explanation-4: -Phylum Chordata belongs to the Kingdom Animalia and includes all the vertebrates, i.e., animals with a backbone, and several invertebrates, i.e., organisms without a backbone. They possess a bilaterally symmetrical body and are divided into three different sub-phyla.

Detailed explanation-5: -The phylum chordata (animals with backbones) is divided into five common classes: fish, amphibians, reptiles, mammals and birds.