1. What is hybridization of living things? 2. What advantages are there to hybridization of living things?
3. Much of our food and resources come from plants and animals that have been bred over many years using
hybridization. Do you think that humans should control and change the traits of these organisms? Explain why you
think yes or no

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.