Q10 of 45 Page 17

Name the animal, which exhibits the phenomenon of bioluminescence. Mention the phylum to which it belongs.

The phenomenon of production and emission of light by an organism as a result of chemical reaction during which chemical energy is converted to light energy is called bioluminescence.


Members of the phylum ctenophores like Ctenoplana, Velamen, Beroe, etc.


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8

Mention one example each for animals with chitinous exoskeleton and those covered by a calcareous shell.

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What is the role of radula in molluscs?

 11

Write one example each of the following in the space provided.

a. Cold blooded animal ________________________


b. Warm blooded animal ________________________


c. Animal possessing dry and cornified skin _______________


d. Dioecious animal _____________________


 12

Differentiate between a diploblastic and a triploblastic animal.