Question

How do poriferans different from coelenterates

Answer 1

Porifera: cellular level of organisation, unsymmetrical
Coelenterates: tissue level of organisation,radially symmetrical

Answer 2

PORIFERANS -

• The poriferan are organized in cells.

• They have collar cells in gastral layer.

• Poriferan have spongocoel body cavity.

• Sexual reproduction forms amphiblastula.

• Sycon, Euplectella, Spongilla, Euspongia are the examples of Porifera.

COELENTERATES-

• The coelenterates are organized in tissues.

• They have Cnidoblasts in epidermis.

• The central cavity called coelenteron.

• They includes free living planula larva.

• Hydra, Jelly fish, Obelia, Sea anemone are the examples of coelenterata.