Lichens and Their Significance · NCERT Biology

The thallus of a lichen refers to:

  1. Only the fungal body
  2. Only the algal body
  3. The combined body of fungus and alga
  4. The reproductive structure
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Correct answer: The combined body of fungus and alga

The thallus is the vegetative body formed by both fungal and algal components. It functions as a single integrated unit.

Difficulty: Medium Question 15 of 20

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