Question:
One of the following is not the characteristic feature of cyanobacteria.
One of the following is not the characteristic feature of cyanobacteria.
Updated On: Jun 14, 2022
- They are multicellular
- They form colonies
- They form blooms in polluted water bodies
- They can fix atmospheric nitrogen
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The Correct Option is A
Solution and Explanation
Cyanobacteria is a phylum consisting of two groups of photosynthetic eubacteria (Cyanophyta or Chloroxybacteria). They are unicellular but sometimes become joined in colonies or filaments by a sheath of mucilage. They occur in all aquatic habitats. A few species fix atmospheric nitrogen and thus, contribute to soil fertility. In eutrophic warm ponds and lakes, certain cyanobacteria can reproduce rapidly to form blooms.
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The process of grouping living organisms into categories is called biological classification. The most modern 5-kingdom classification was put ahead by an eminent scientist R.H.Whittaker. The five-kingdom classification is based on the criteria like cell structure, mode of nutrition, body form, and reproduction. One of the most important characteristics of this system is that it follows the evolutionary sequence of living organisms. The organisms are classified into distinct taxa or levels like Kingdom, Phylum, Division, Class, Order, Family, Genus, and Species. The 5 kingdoms are as follows:
