Question

Which one of the following pairs is correctly matched?

(a) parasitism – intra-specific relationship

(b) uricotelism – aquatic habitat

(c) excessive perspiration – xeric adaptation

(d) stream lined body – aquatic adaptation.

Answer 1

(d) Streaming body is a secondary aquatic adaption. It is found in animals that live permanently in water but most of them are amphibious in nature. The streamlined body consists of compression of head, body and tail into a curved stream lined form. There is no protruberance over the body so that the animal can move easily through water. Parasitism is a relationship between two organisms of different species in which one organism called parasite obtains its food directly from another living organism called host.