Question

One major difference between the carbon, nitrogen, and sulfur cycles compared to the phosphorous, calcium and silica cycles is that the P. Ca, and Si cycles are NOT affected by global warming or other human activity the R. Ca, and Sicycles do NOT involve redox changes or gaseous forms that can alter Earth's atmospheric chemistry . Ca and Si are NOT cycled in terrestrial environments. the R. Ca and Sicycles do NOT involve microbial activity

Answer 1

B) . the P, Ca, and Si cycles do NOT involve redox changes or gaseous forms that can alter Earth's atmospheric chemistry.

Recycling of inorganic matter between biotic and abiotic components of environment is called as biogeochemical cycle. Like C, N and S cycles other cycles like Fe, Mn and Cr also involve redox chemistry. However biogeochemical cycles like P, Ca and Si don’t involve redox chemistry or gaseous forms rather involve fluctuations in the solubility of compounds. These elements are involved in the exoskeleton of marine organisms. Phoshorous and silica are sedimentary cycle as the main reservoir is the soil.