Question

Regarding assertion and reason , choose the correct option.
Assertion [A]: Lichens represent an intimate mutualistic relationship between fungi and photosynthesising algae.
Reason [R]: Mutualistic organisms mostly occupy the same niche and are studied together as they are functionally interlinked.

• A. Both A and R are true and R explains A
• B. Both A and R are true R does not explain A
• C. A is true and R is false
• D. Both A and R are false

Answer 1

The correct option is A Both A and R are true and R explains A

Symbiosis in lichens is the mutualistic relationship of algae living among filaments of a fungus. The fungus benefits from the algae or cyanobacteria because they produce food by photosynthesis. The fungus provides water, nutrients and shelter for the algae. As both the partners in lichens are interlinked functionally and occupy the same niche they are studied together.