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