EVERYDAY SCIENCE

Detailed explanation-1: -The first person to classify animals was Aristotle. His attempt to classify all the organisms was written in his book ‘History of Animals’.

Detailed explanation-2: -Answer and Explanation: Before the widespread availability of affordable DNA sequencing, morphological characteristics were used to classify organisms. Organisms with more features in common were classified as closely related, while those with fewer features in common were considered more distantly related.

Detailed explanation-3: -Animals have been traditionally classified according to two characteristics: body plan and developmental pathway. The major feature of the body plan is its symmetry: how the body parts are distributed along the major body axis. Symmetrical animals can be divided into roughly equivalent halves along at least one axis.

Detailed explanation-4: -In accordance with the Linnaeus method, scientists classify the animals, as they do the plants, on the basis of shared physical characteristics. They place them in a hierarchy of groupings, beginning with the kingdom animalia and proceeding through phyla, classes, orders, families, genera and species.