State two ways in which a single-celled organism, such as amoeba and a human body cell are alike

How many types of rock can form from the rock cycle

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box

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.