Q82 of 525 Page 254

Name the following:

(a) Cavity present in the body of sponges.


(b) Cavity present in the body of cnidarians

(a) Central cavity present in the body of sponges is called spongocoel; (b) The cavity present in the body of cnidarians is called coelenteron.


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What is bilateral symmetry?

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Name a fresh water sponge?

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What is the skeleton of sponges made up of?

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Name the following :

(a) Simplest sponges;


(b) Commonly known as bath sponge.