Classification Of Animals

Answer (a) Radial

Answer (b) Asymmetrical

Answer (a) Ectotherms

All the chordates possess four diagnostic characters either in the embryonic or adult stage: notochord, dorsal hollow nerve cord, pharyngeal gill slits and tail.

Labeo rohita (Rohu or Carp) is a fish that occurs in rivers and streams in India. It is carnivorous when young and becomes herbivorous in adult. It has laterally compressed, spindle-like body grey above and silvery white elsewhere.

In echinodermata, the symmetry is bilateral in larvae but pentamerous radial in adults, i.e., body parts are arranged in fives or multiples of five.

Answer (b) Hemichordata

Answer (d) Arthropoda