give the characteristics of the following:

Asked by  | 11th Oct, 2008, 02:57: PM

Expert Answer:

Porifera means pore-bearing.

Features:

i) Sessile, sedentary and mostly marine.

ii) Simple multicellular, diploblastic animals with minimal differentiation into tissues.

iii) Body shows numerous holes or pores called ostia that open into a canal system. One or more large outlets called oscula are present.

iv) They are covered with a hard outside layer or skeleton.

v) Mouth, digestive system and anus absent.

vi) Reproduction both asexual and sexual.

Answered by  | 11th Oct, 2008, 06:41: PM

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