Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test Environmental Studies Ecology Biogeochemical Cycle
Which one of the following is a sedimentary type of biogeochemical cycle?
1
Phosphorus and sulphur
2
Oxygen and nitrogen
3
Phosphate and nitrogen
4
More than one of the above
5
None of the above