URGENT PLEASE HELP Rashid is conducting a seminar on the importance of coral reefs. Which point should he include?
A. that corals can be picked from the sea and sold
B. that corals are poisonous and can be used for pest control
C. that corals have a hard exoskeleton that can be used for construction of buildings
D. that corals are impervious to damage
E. that corals provide economic assistance to coastal populations through fisheries

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.