Multiple Choice
Why are lichens a good indicator of environmental quality?
A) If the soil is polluted, they cannot produce roots.
B) They cannot excrete absorbed toxins.
C) They cannot absorb toxins.
D) If the air is polluted, they cannot get enough sunlight for photosynthesis.
E) Toxins inhibit their reproduction.
Correct Answer:

Verified
Correct Answer:
Verified
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