CBSE Class 9 Biology Biogeochemical Cycles
- how the nitrogen cysle works
- Why does not the level of oxygen in the atmosphere decrease?
- Why is phosphorus and sulphur cycle called as sedimentary cycle?
- explain in brief about nitrogen cycle
- What are leguminous plants?
- Nitrogen cycle
- Define biogeochemical cycle or what is biogeochemical cycle?
- Define biogeochemical cycle.
- What is leg haemoglobin?
- Which cycle is known as the perfect cycle in biosphere? Why?
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