Animal KingdomHard
Question
What is true about all sponges without exception ?
Options
A.They are all marine
B.They have flagellated collar cells
C.They have a mixed skeleton consisting of spicules and spongin fibres
D.They reproduce only asexually by bussing
Solution
Sponges are all aquatic, mostly marine but few fresh water forms also exist. Choanocytes or collar cells are only present in sponges.
Sponges usually have a skeleton consisting of spicules or spongin fibres.
Sponges reproduce asexually by budding, gemmules and reproduce sexually too.
Sponges usually have a skeleton consisting of spicules or spongin fibres.
Sponges reproduce asexually by budding, gemmules and reproduce sexually too.
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