Question:

Algal blooms are formed in nutrientless water. Algal blooms in water turn it unfit for human consumption, but cause enormous growth of fish.

Updated On: Jul 28, 2022
  • If both assertion and reason are true and reason is the correct explanation of assertion
  • If both assertion and reason are true but reason is not the correct explanation of assertion
  • If assertion is true but reason is false
  • If both assertion and reason are false
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The Correct Option is D

Solution and Explanation

Algal blooms are a result of eutrophication. Eutrophication involves change in biological productivity and nutrient content of a water body. Eutrophication literally means 'well nourished or enriched'. Eutrophication become excessive, when abnormally high amount of nutrients from sewage, fertilizers, animal wastage and detergent, enter streams and lakes causing excessive growth or blooms of microorganisms. They are harmful for both humans and aquatic organisms. Eutrophication results in higher BOD and reduced dissolved oxygen in water body. It causes death of fish and other aquatic animals.
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Concepts Used:

Algae

An Algae is a term mentioning a group of photosynthetic eukaryotic organisms. It has chlorophyll and nucleus but no root, stem, leaves and many features like normal land plants. Algae is both unicellular (e.g. Euglenophyta) and multicellular (e.g. seaweeds). Algae do photosynthesis and help in oxygen production

Algae can live in various habitats like moist rocks, soils, water bodies (both freshwater and marine) and in some animals (e.g. Sloth). Unicellular Algae belong to the Protista Kingdom and Multicellular algae belong to the Plantae Kingdom, but formerly all algae are categorized under kingdom Plantae for their photosynthetic nature.

Also Read: Difference Between Algae and Fungi

Algae