NCERT Important Questions Class 9 Science biology Chapter 14
Important NCERT Extra Questions
Chapter 14 Natural Resources
NCERT Book Extra Questions for Session 2021-2022
CBSE Board and UP Board Others state Board
What are biogeochemical cycles?
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Biogeochemical cycles are repeated circulation of biogeochemicals between abiotic and biotic components of the environment which result in their repeated withdrawal and replacement of their pool.