Which one of the following living organisms gives litmus ?

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Q: 26 (CDS-I/2022)

Which one of the following living organisms gives litmus ?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,196,57,22,7,196,28

keywords: 

{'saccharomyces': [0, 0, 0, 1], 'organisms': [4, 1, 3, 2], 'litmus': [0, 0, 0, 1], 'lichen': [1, 0, 0, 0], 'protozoa': [1, 0, 0, 0], 'virus': [4, 0, 0, 1]}

The correct answer is option 3, Lichen. Lichen is a unique organism consisting of a symbiotic relationship between a fungus and an alga or cyanobacterium. Lichen is known to produce a natural dye called litmus, which can be used as an indicator in chemical reactions.

Option 1, Protozoa, is incorrect. Protozoa are single-celled microorganisms that do not produce litmus.

Option 2, Virus, is also incorrect. Viruses are not considered living organisms and cannot produce litmus.

Option 4, Saccharomyces, is incorrect. Saccharomyces is a type of yeast that is used in baking and brewing, but it does not produce litmus.

Therefore, the correct answer remains option 3, Lichen. Lichen is the living organism that gives litmus.