Biological Classification And System Of Classification Question 234
Question: Lichens indicate $ SO_2 $ pollution because they [CBSE PMT 1989; 92; BVP 2000]
Options:
A) Show association between algae and fungi
B) Grow faster than others
C) Are sensitive to $ SO_2 $
D) Flourish in $ SO_2 $ rich environment
Show Answer
Answer:
Correct Answer: C
Solution:
Lichens are very sensitive to air pollution, particularly to higher $ SO_2 $ concentration in the atmosphere.
This $ SO_2 $ causes plasmolysis of algae cells and converts chlorophyll of algae into pheophytin by removing Mg.
Phaeophytin results in chlorosis and death of lichen.
BETA
