Earth's tides are caused by the influence of celestial bodies. Which body has the greatest influence on tides?
A. sun because it's larger than the moon

B. moon because it's closer than any other celestial body

C. Earth because that's where we live

D. Jupiter because it's larger than the sun

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.