The echinoderms are
arborial insects
marine animals
terrestrial insects
freshwater forms
B.
marine animals
All members of Phylum- Echinodermata are marine. Therefore, Echinoderms are marine, spiny skinned animals. They have water vascular system for locomotion, eg, starfish, Antedon.
Arboreal insects lives on trees. Freshwater forms are animals or plants living in fresh water of ponds, eg, Hydrilla.
Animals having a built in thermostat to maintain constant body temperature are known as
biothermic
poikilothermic
oligothermic
homeothermic
Which of the following cell type is capable of giving rise to other cell types in sponges?
Thesocytes
Pinacocytes
Cnidocytes
Archaeocytes
