Sea Star is

Sponge and Sea star show calcareous protective material. Do they belong to the same Phyla?

Pedicellariae of sea star is a pincer-like structure which I.is used for biting and rasping . II.helps in keeping the body surface clean . III.helps in cloacal respiration . IV.acts as organ of offence . Choose the correct option .

Sea stars are

Sea star belongs to the class

Sponge and sea star show calcareous protective material. Do they belong to the same Phylum?

Find the odd one out: Star fish, Sea-urchin, Nereis, Sea-cucumber

To which phylum do the following animals belong : Sea horse , Cuttle fish , Star fish, Hag fish, Silver fish.

Picks the odd one out and justify your choice by giving reasons (a) Moss, fern, Pinus, Spirogyra (b) Sea cucumber, Octopus, Feather star, Star fish.

Aristotle's lantern which helps in mastication is a characteristic feature of 1)Asterian (Star fish) 2) Echinus (Sea urchin) 3) Antedon (sea lily) 4) Ophiura (brittle star)