Examlex
IUDs are currently available by prescription in the United States.
Pore Space
The voids or gaps between soil particles, which can hold air or water, essential for plant growth and the movement of groundwater.
Biogeochemical Cycles
The natural processes that recycle nutrients and elements among the biosphere, atmosphere, lithosphere, and hydrosphere.
Hydrologic Cycle
The continuous movement of water on, above, and below the surface of the Earth, including processes such as evaporation, precipitation, and infiltration.
Carbohydrate Cycle
The series of processes by which carbohydrates are synthesized, broken down, and reused in the biosphere.
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