1. which type of development prepare teens for marriage?
a. athletic ability
b. job and career skills
c. talent for entertaining
d. grooming routine
2. which development event in the teen years is least likely to prepare one for marriage?
a. developing a sense of humor
b. becoming comfortable in one’s body
c. becoming emotionally mature and developing goals
d. developing effective interpersonal communication skills

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.