Question

Lichens are indicators of pollution because ________

• A. They grow in oxygen depleted regions
• B. They don’t grow in polluted regions
• C. They grow in polluted regions
• D. Their growth indicates that the region has very high carbon levels

Answer 1

Answer:

B. They don’t grow in polluted regions

The co-existence of algae with fungus is called lichens. Lichens are the best examples of symbiotic association. They are also good indicators of pollution as they don’t grow in polluted regions.