NEET BIOLOGY

Detailed explanation-1: -Phylum Echinodermata belongs to kingdom Animalia, they are triploblastic animals. Examples of echinoderms include sea star, sea urchins etc. Echinoderms are marine animals, they are unisexual and their body have a tough spiny exoskeleton.

Detailed explanation-2: -Examples of echinoderms include sea stars, sea urchins, sea cucumbers, brittle stars, and feather stars (Fig. 3.83). Although they may appear very different, echinoderms all have two major defining characteristics that set them apart from all other animals: a water vascular system and five-sided radial symmetry.

Detailed explanation-3: -Echinoderms are “spiny-skinned” invertebrate animals that live only in marine environments.

Detailed explanation-4: -Antedon or sea lily, Cucumaria or sea cucumber, Echinus or sea urchins and Ophiura or brittle star belong to the phylum Echinodermata.

Detailed explanation-5: -Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin.