DENDROLOGY

Detailed explanation-1: -The classification of animals largely can be done into two groups: invertebrates and vertebrates. The basic difference between the two is the presence of a backbone or a spinal column.

Detailed explanation-2: -Animal kingdom can be broadly classified into two major groups i.e. vertebrates and invertebrates.

Detailed explanation-3: -Invertebrates come in many shapes and sizes and include insects, spiders and scorpions, crustaceans, such as crabs and lobsters, slugs and snails, jellyfish, and worms. Vertebrates are animals with backbones. This group includes reptiles, fish, amphibians, birds, and mammals.

Detailed explanation-4: -Vertebrates can be subdivided into five major groups: fishes, amphibians, reptiles, birds, and mammals. Amphibians, reptiles, birds, and mammals are ranked as classes. The fishes includes five different classes: Myxini, Hyperoartia, Chondrichthyes, Actinopterygii, and Sarcopterygii.