phylum porifera Flashcards
1
Q
the members here are commonly called as
A
sponges
2
Q
exit and entry of water takes place thro
A
osculum and ostia respectively
3
Q
general characteristics of poriferans
A
asymmetrical, generally marine, cellular level
4
Q
the central cavity is called as
A
spongocoel
5
Q
what is their sex and how do they reproduce
A
these are hermaphrodite and can do sexually thro gametes and asexually thro fragmentation
6
Q
cells lining spongocoel
A
collar cells or choanocytes
7
Q
the body is supported by a skeleton of
A
spicules/ spongin fibres
8
Q
how are fertilisation and development
A
internal and indirect respectively
9
Q
examples are?
A
sycon (scypha) , spongilla ( fresh water sponges) and euspongia (bath sponge)
