Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Ecology and Environment Environmental pollution
Which of the following is used as biological indicator of sulphur-dioxide pollution?
1
Bryophytes
2
Lichen
3
Pseudomonas
4
More than one of the above
5
None of the above