Question

On what basis, animals are categorized into three parts?

Answer 1

Answer:

. The main disadvantage of friction is that it produces heat in various parts of machines. In this way some useful energy is wasted as heat energy. ... Due to friction, engines of automobiles consume more fuel which is a money loss.

Answer 2

Answer:

Explanation:

Depending on the presence/absence of coelom, animals have been classified into three: Coelomate: Coelom is present in a coelomate. Animals belonging to phyla Annelida, Mollusca, Arthropoda, Echinodermata, Hemichordata and Chordata are examples of coelomates.