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(i) Some dinosaurs had feathers but coul...

(i) Some dinosaurs had feathers but could not fly using these feathers. Why?
(ii) What is a sex chromosome?

Text Solution

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(i) The evolution of feathers in certain dinosaurs had nothing to do with flight. In them, the feathers carried out the function of providing insulation in cold weather.
(ii) Sex chromosome is either a pair of chromosomes, usually designated X or Y, in the germ cells of most animals, that combine to determine the sex and sex- linked characteristics of an individual.
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