Which statement best compares segmented worms and roundworms? Some segmented worms have setae, but roundworms do not. Some roundworms have setae, but segmented worms do not. Segmented worms have sense organs, but roundworms do not. O Roundworms have sense organs, but segmented worms do not.​

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.