Answer:
Parasites have evolved special adaptations
such as
(i) The loss of unnecessary sense organs
as in lice, mites and fleas don't have wings.
(ii) Presence of adhesive organs
or suckers to cling on to the host-in tapeworms and leeches.
(iii) Loss of digestive system
i.e., tapeworm.
(iv) High reproductive capacity
i.e., roundworm produces large progeny.
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