Q. Absence of circulatory system in Hydra is compensated by
Solution:
Solution:
Hydra is a relative of corals and jellyfish. All these species are members of the phylum Cnidaria characterised by symmetrical bodies crowned by 10-12 tentacles and an opening called a gastrovascular cavity. This class of organisms don't have a specialised circulatory system. They have a thin layer of cells which when coming in contact with water, absorb the nutrients and oxygen required by the body.