Question

three characteristics of porifera

Answer 1

1.Porifera is commonly known as sponges.
2.These are multicellular organisms.
3.Body is cylindrical, asymmetrical or has radial symmetry.

Answer 2

1. Poriferans are commonly called sponges .
2. These are multicellular organisms which are sessile/sedentary in nature.
3. Body wall is diploblastic which consists of an outer layer called pinacoderm and an inner layer called choanoderm
4.Most of them are marine while a few are fresh water forms
5.Respiration takes place by diffusion of oxygen from water the flowing into the body.
6. Reproduction may be asexual or sexual.