Animal Kingdom Question 75
75. Cell-tissue-body organisation is characteristic of
(a) Star fish
(b) Hydra
(c) Liver fluke
(d) Sponge
Show Answer
Answer : b
Hints & Solutions
(b) Sponges show cell aggregate body organization. Cell tissue organization appear in coelenterates. Platyhelminthes show tissue organ organizations. Hydra is a genus of small, fresh-water organisms of the phylum Cnidaria and class Hydrozoa. They are native to the temperate and tropical regions. Biologists are especially interested in Hydra because of their regenerative ability - they do not appear to die of old age, or indeed to age at all.
