Is a solid is crushed to a powder a chemical or physical change?

What is the inability of an individual or a society to achieve a minimum standard of living known as ?

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.

Each nephron is made up of capillaries that form the __ sweat glands bladder glomerulus ureter