A- Circulates in the carbon cycle very slowly B- It is readily available to the biosphere C- The rocks weather readily to release the carbonD- Only tbicarbonate is used in photosynthesis E- Carbon-containing minerals are completely insoluble Answer with a proof please whether by link or explanation . Thanks
A evenually (over long geologic time the rocks will break down and release their carbon) the carbon in rocks does circulate in the carbon cycle--humans have greatly increased the release by burning fossil fuels. Volcanic eruptions release some carbon from rocks and so do things such as rain weathering limestone.
Other than very rare diamonds, the carbon in rock is there as carbonate. Limestone is calcium carbonate; dolomite is calcium magnesium carbonate. They are the big ones. Neither is especially soluble. This makes the carbonate fairly unavailable to plants. A
