Question:

Many blue-green algae occur in thermal springs (hot water springs). The temperature tolerance of these algae has been attributed to

Updated On: Jun 7, 2022
  • mitochondrial structure
  • homopolar bonds in their proteins
  • cell wall structure
  • modern cell organisation.
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The Correct Option is B

Solution and Explanation

There are a sufficient number of thermophilic Cyanophyceae. They constitute the principle vegetation of hot springs. They are able to live in water whose temperature is as high as 85?C. Because of their gelatinous sheaths, they can withstand long periods of desiccation. The compactness of protein molecules and their bonds in the protoplasm also help the cells to face the extremes.
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Concepts Used:

Biological Classification

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:

Biological Classification