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Question
The simplest type of sponge - Olynthus is
The simplest type of sponge - Olynthus is
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Solution
The correct option is C A transitory in the life history of Sycon
The 'Olynthus' is the simplest known type of sponge as it has the simplest type of canal system (ascon). It occurs as a transitory stage in the life-history of all calcareous syconoid sponges. In syconoid sponges, gastrula swims about and settles on a rock with blastopore against the rock and grows to form 'Olynthus' stage and looks like a little sponge. Thus, the correct answer is option C.
The 'Olynthus' is the simplest known type of sponge as it has the simplest type of canal system (ascon). It occurs as a transitory stage in the life-history of all calcareous syconoid sponges. In syconoid sponges, gastrula swims about and settles on a rock with blastopore against the rock and grows to form 'Olynthus' stage and looks like a little sponge. Thus, the correct answer is option C.
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