Why are lichens considered excellent indicators of air pollution?
1. They thrive in environments with high concentrations of nitrogen and sulphur compounds. 
2. They are sensitive to airborne pollutants, which disrupt their symbiotic relationship. 
3. They absorb heavy metals from the environment promoting their growth. 
4. They can metabolize and break down organic pollutants in the air.
Subtopic:  Lichens |
 85%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.

How many of the given pairs are correctly matched? 
I: Fungi: Saprotrophs 
II: Lichens: Mutualism
III: Malarial parasite in human RBC-commensal
1. 0 
2. 1 
3. 2
4. 3
Subtopic:  Kingdom Fungi: Introduction | Lichens |
 65%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.