1. Tardigrade
  2. Question
  3. Biology
  4. Which of these statement/s about lichens is/are true? I. Lichens are mutually beneficial symbiotic associations. II. They grow extensively in areas with high pollution, hence called as pollution indicators. III. The phycobiont member, algae, is an autotroph and the mycobiont member, fungi, is a heterotroph. IV. Fungi help the algae harvest sunlight for photosynthesis.

Q. Which of these statement/s about lichens is/are true?
I. Lichens are mutually beneficial symbiotic associations.
II. They grow extensively in areas with high pollution, hence called as pollution indicators.
III. The phycobiont member, algae, is an autotroph and the mycobiont member, fungi, is a heterotroph.
IV. Fungi help the algae harvest sunlight for photosynthesis.

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Solution:

Lichens are a symbiotic association of the algae (phycobiont) and fungi (mycobiont). The algal partner produces food and the fungal partner provides protection to the algae. The fungi also help in absorption of minerals and water. Lichens generally do not grow in polluted areas, hence they are good indicators of pollution.