Select all of the special adaptations that a cactus has in order to survive in the desert. Tough exterior
smooth outer covering
it can store water
it eats other plants

Theories basic to all of the life sciences include the germ theory of disease. theory of evolution by natural selection. o two of these answers are correct none of these answers are correct o cell theory.

At which point is crust neither created nor destroyed? island chain mid-ocean ridge divergent boundary transform boundary

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.