Assertion: In Pleurobrachia, eight comb like ciliary plates called comb plates are present on the body that help in locomotion.
Reason: Pleurobrachia reproduces sexually and its life cycle includes cydippid larva.

Select the option with a correct representation of phylum of animal to the below - mentioned features : I. The body is supported by a skeleton made up of spicules or spongin fibers with choanocytes line the spongocoel. II. Specialized cells called flame cells help in osmoregulation and excretion. III. The body bears eight rows of ciliated comb plates which helps in locomotion. IV. The alimentary canal is complete with the well developed muscular pharynx.

Select the option with a correct representation of phylum of animal to the below - mentioned features : I. The body is supported by a skeleton made up of spicules or spongin fibers with choanocytes line the spongocoel. II. Specialized cells called flame cells help in osmoregulation and excretion. III. The body bears eight rows of ciliated comb plates which helps in locomotion. IV. The alimentary canal is complete with the well developed muscular pharynx.

Read the following statements. (a) Metagenesis is observed in Helminthes (b) Echinoderms are triploblastic and coelomate animals (c) Roundworms have organ system level of body organization (d) Comb plates present in ctenophore help in digestion (e) Water vascular system is characteristic of Echinoderms. Choose the correct answer from options given below.