Lichens
1. Are Air pollution sensors
2.destruct soil
3. Are classified on the basis of colour
4. Are an association between cynobacterium and a green algae
5. Are indicators of air quality
6. Are sensitive to changes in environmental conditions
7. Can survive in extreme environments
8. Have a symbiotic relationship with fungi
9. Have the ability to break down rocks and contribute to soil formation
10. Are used as bioindicators in ecological studies
Lichens are an interesting symbiotic association between a fungus, specifically a mycobiont, and either a cyanobacterium or a photosynthetic green algae, called a photobiont. They are commonly found in various environments, including deserts, forests, and even urban areas.
Regarding your statements:
1. Lichens can indeed act as bioindicators of air pollution. They are sensitive to changes in air quality and can be used as sensors to assess air pollution levels. Certain species of lichens are more tolerant of pollution, while others are more sensitive and can only survive in areas with cleaner air.
2. Lichens do not destruct soil. In fact, they contribute to soil formation and play a vital role in ecological processes. Their growth and gradual decomposition contribute organic matter to the soil, enhancing its fertility and supporting other organisms in the ecosystem.
3. Lichens can be classified based on various characteristics, including their shape, growth form, and thallus color. They can range in color from green, gray, yellow, orange, red, brown, or even black. Color can be used as one classification criterion, but it is not the sole basis for classification.
4. Your statement is correct. Lichens are indeed an association between a cyanobacterium or a green algae and a fungus. The cyanobacterium or green algae provide photosynthetic capabilities, producing food for the lichen, while the fungus provides protection, anchorage, and absorbs nutrients from the surrounding environment. This mutualistic relationship allows lichens to survive in diverse habitats where neither the fungus nor the photobiont could thrive alone.