In our country out of the total fires, the number of fires caused by the natural causes (lightening, rolling stones or rubbing of dry bamboo with each other etc.) is not more than _________ per cent of total number of fires.

Question

Match the structures with their functions in Cnidaria:

List I	List II
A. Cnidoblast --- I. Used for anchorage, defence and for the capture of prey B. Polyps --- IV. Produce Medusae asexually C. Medusae --- II. Used to form the polyps sexually D. Hypostome --- III. Single opening for gastrovascular cavity	I. Used for anchorage, defence and for the capture of prey IV. Produce Medusae asexually II. Used to form the polyps sexually III. Single opening for gastrovascular cavity

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