Select all that apply.
select the items that have a ph level between 5 and 8.
pure water
great salt lake
saliva
ammonia

What is the primary goal of human communities?

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.

Can nonrenewable resources be used sustainably?