The excessive growth of free-floating algae caused by nutrient enrichment of water bodies through various means is called algal bloom. The nutrients act as food for algae hence support the growth of algae. Due to the algal bloom, the water body is green in colour.
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(a) ‘‘India has greater ecosystem diversity than Norway.’’ Do you agree with the statement? Give reasons in support of your answer.
(b) Write the difference between genetic biodiversity and species biodiversity that exists at all the levels of biological organization.
Explain the effect on the characteristics of a river when urban sewage is discharged into it.Biology - Board Papers