Q9 of 45 Page 17

What is the role of radula in molluscs?

Radula is a special structure in molluscs which is used to scrape and scratch the food and to create depression in rocks which molluscs use as their habitat.


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7

Mention two modifications in reptiles required for terrestrial mode of life.

 8

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

 10

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

 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 _____________________