SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Profuse growth of a red flowered plant
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Red bloom caused by a blue green alga
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Red bloom caused by a red alga
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Red coloured effluents deposited in it
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Detailed explanation-1: -Its name is derived from the colour changes observed in its waters. Normally, the Red Sea is an intense blue-green; occasionally, however, it is populated by extensive blooms of the algae Trichodesmium erythraeum, which, upon dying off, turn the sea a reddish brown colour.
Detailed explanation-2: -The Red Sea is named for an occasional bloom of the cyanobacteria, Trichodesmium erythraeum algae, which accumulates and muddies the usually translucent blue-green waters. These cyanobacteria appear as red and pinkish blankets on the surface of these waters.
Detailed explanation-3: -Thus, the correct answer is ‘Blue-green algae.
Detailed explanation-4: -Hint: Trichodesmium erythraeum are a species of cyanobacteria. They are pigmented. These pigments give the sea a red hue. This type of algae blooms and accumulates on the surface of the water.