Animal Kingdom Question 1012
Question: Which is universal for sponges
[CBSE PMT 1996]
Options:
A) Marine
B) Calcareous spicules
C) Radial symmetry
D) High regenerative power
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Answer:
Correct Answer: D
Solution:
A. Sponges may be marine (for example, Sycon) or freshwater (for example, Spongilla).
B. Calcareous spicules are present in the skeleton of sponges belonging to class Calcarea.
C. Sponges may have radial symmetry if their body can be cut into identical halves through any plane that passes through the centre of the body from top to bottom or they may be asymmetrical if they can’t be cut into identical halves through any plane of the body.
D. Sponges have great power of regeneration. They can replace their lost body parts with the power of regeneration. Regeneration is a universal property for sponges.
So, the correct answer is ‘High regeneration power’.
BETA
