What is the purpose of the biogeochemical cycles? -to cycle energy through a food chain -to recycle matter through the biosphere -to recycle rocks through the layers of earth -to cycle nutrients through the human body

The rate at which molecules water and oxygen can enter a cell is determined by the-

What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature above 37 degrees celsius (98.6 degrees f)? describe what might happen if the temperature decreased by 10 degrees celsius.