Give one example of an exoskeleton animal which is a crustacean.
Exoskeleton:
Example of crustacean having exoskeleton:
(a) Give an example of an endothermic animal.
(b) Give an example of an ectothermic animal.
(c) Give an example for an organism of the benthic zone.
Give an example for:
(a) An endothermic animal
(b) An ectothermic animal
(c) An organism of benthic zone
Give one example each for an animal possessing placoid scales and that with cycloid scales.