Question

Differentiate between the following.
a. Porifera and Cnidarian​

Answer 1

Cnidaria and porifera are two different phyla. Cnidarians have Cnidocytes but not the poriferans. Cnidarians have well-organized organ systems but not the poriferans; on the other hand, poriferans have an efficient tunnel system made up of pores but not the cnidarians.

Answer 2

porifera

1. animals are asymmetrical

2. water canal system is well developed.

3. they show the presence of choanocytes or collar cell.

4. they have a skeleton of spicules or sponging fibres

5. they show cellular level of organization

cnidarian

1. animalsf are radially symmetrical

2. water canal system is absent

3. they show the presence of cnidoblasts or nematocytes

4. only some canidarion show the presence of skeleton which is made of calcium carbonate

5. they show tissue level of organisms.