1.

of grasshoppers, some green and some brown, lived in a grassland having drygrassho1. A groupbushes and dry grass.(0 Which one would normally be picked up by the predatory birds and why?(i) Population of which grass hopper will increase? Justify your answer.(n) Name the phenomenon.

Answer»

(i) The predatory birds will pick up the green coloured grasshoppers as these will be visible against a pale yellow background of dry bushes and dry grass.(ii) The population of brown grasshoppers will increase as they have camouflaged the background due to which the predators will not be able distinguish them from the background and thus brown grasshoppers will survive.(iii) This phenomenon is known as directional natural selection.



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