How is hydra different from spongilla ?
Answers
Sponges belong to the phylum Porifera ("pore bearers"), while hydra are members of the phylum Cnidaria. In addition, hydras are predatory animals, whereas sponges are filter feeders. Being in the phylum Porifera, sponges are complex aggregations of specialized cells, and these cells do not form true tissues and organs. Sponges are among the structurally simplest multicellular organisms. Hydras, on the other hand, are organized at the tissue level, and thus they are able to perform functions, such as respong to external stimuli and engulf prey. Hydras are also radially symmetrical.
Answer:
Sponges belong to the phylum Porifera ("pore bearers"), while hydra are members of the phylum Cnidaria. ... Hydras, on the other hand, are organized at the tissue level, and thus they are able to perform functions, such as respong to external stimuli and engulf prey. Hydras are also radially symmetrical.