NTA Abhyas NEET2020BotanyBiological ClassificationPractice
Lichens are symbiotic association between two organisms. Which of these statements about them is true?
Options
- ALichens are fast growing organisms that live for a short period
- BThe algal component is called mycobiont and fungal component is called phycobiont
- CThey are pioneers of vegetation on rocks.
- DThey grow well in cities.
Correct answer
C. They are pioneers of vegetation on rocks.
Step-by-step solution
Lichens are symbiotic associations between algae and fungi. The autotrophic algal component is called phycobiont and the heterotrophic fungal component is called as mycobiont. Algae prepare food for fungi and fungi provide shelter and absorb mineral nutrients and water for its partner. Lichens are very good pollution indicators - they do not grow in polluted areas and in cities. Lichens are pioneers in the xerosere type of ecological succession on barren rocks.