Question
Biology Question on biological classification
A sponge differs from all other matazoans in having:
A
nerve cells
B
absence of blood
C
numerous mouthlets and one exit
D
none of these
Answer
numerous mouthlets and one exit
Explanation
Solution
Body of sponges in perforated by many pores (ostia) through which water enters the paragastric cavity opening to exterior by a large opening called Osculum through which water exists.