Q.50 Two organisms occupying a particular geographical area (say desert) show similar adaptive strategies. Taking examples, describe the phenomenon.
not closely related, evolve similar traits independently as a result of adaptation to similar
environment. e.g.,
(i) Streamlined shape of sharks and dolphins. The former is a fish, while dolphin is a
mammal, but both of them depend on swift movement through the water, so a
streamlined shape is essential. Thus, it is the similar habitat that resulted in selection of
similar adaptive features in different groups of organisms, but toward the same
function.
(ii) Spines (modified leaves) and thorns (modified stems), both look similar and provide
protection to the plant, but the plants to which they belong are distantly related.
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