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With reference to lichens, which of the following statements is/are correct ?
1. Lichens are very good indicators of pollution.
2. Lichens grow well in polluted areas.
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Code :
Explanation
Lichens are symbiotic organisms consisting of a fungus and an alga or cyanobacterium. They are widely recognized as excellent bio-indicators of air quality, particularly for sulfur dioxide (SO2) levels. This makes Statement 1 correct.
Lichens lack a protective waxy cuticle and roots, meaning they absorb water and nutrients directly from the atmosphere. This structural characteristic makes them highly sensitive to atmospheric pollutants. In areas with high pollution, lichens fail to thrive, change color, or disappear entirely. Therefore, Statement 2 is incorrect as they do not grow well in polluted environments; rather, their absence or stunted growth is a sign of poor air quality.
SIMILAR QUESTIONS
Which of the following is indicator of air pollution ?
Which of the following groups of plants can be used as indicators of S02 pollution of air?
Which of the following statements is / are correct ? 1. Acid rain reacts with buildings made from limestone 2. Burning of sulphur containing coal can contribute to acid rain 3. Eutrophication is an effective measure to control pollution Select the correct answer using the code given below:
With reference to ecological niche, which of the following statements is/are correct ?
1. It represents the range of conditions that it can tolerate the resources it utilizes and its functional role in ecological system.
2. Each species has a distinct niche.
Select the correct answer from the code given below :
Code :