The activity of which enzyme decreased in both acidic and basic environments

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

Does masterbation affect height growth or loss of growth hormone?

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?