Litmus, a well-known acid-base indicator, is derived from :
Answer
The correct answer is B: Lichens. Litmus is a natural acid-base indicator extracted from certain species of lichens, particularly Roccella tinctoria. Lichens are symbiotic associations between fungi and algae.
A.Fungi
B.Lichens✓ Correct
C.Bacteria
D.Termite
Explanation
Litmus is a natural acid-base indicator extracted from certain species of lichens, particularly Roccella tinctoria. Lichens are symbiotic associations between fungi and algae. The dye obtained from these lichens turns red in acidic solutions and blue in basic solutions, making it a useful pH indicator. Hence the correct source is lichens.
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