give the characteristics of the following:
Asked by | 11th Oct, 2008, 02:57: PM
Porifera means pore-bearing.
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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