(i) Animals of which phylum show the above character? (ii) Give an example from that phylum.

Question

Characters of a phylum are given below. Read them carefully and answer the questions:

(a) Spines of calcium carbonate are present on the body, (b) These animals are exclusively marine, (c) They perform the locomotion with the help of tube feet, (d) Their skeleton is made up of calcareous plates or spicules.

(i) Animals of which phylum show the above character?

(ii) Give an example from that phylum.

(iii) These animals can be classified with the help of which criteria of new system of animals classification.

Answer 1

(i) Animals belonging to phylum Echinodermata show the above characters.

(ii) Starfish, brittlestar, sea urchin.

(iii) Animals are classified on the basis of criteria such as body organization, body symmetry, body cavity, etc.