Which statement about enzymes is true?

a)they are large molecules that decrease the rate of reactions in the body.
b)they are large molecules that increase the rate of biologically important reactions.
c)they slow the rate of chemical reactions.
d)they are permanently changed in the course of a reaction.

Growing crops in places where major pests don't live using beneficial insects to eat harmful insects using a rat trap instead of a rodenticide developing drought-resistant tomato plants using beneficial insects or natural oils to repel pests planting a different crop every year to fake out the pests keeping food covered to deter ants and rodents developing bean plants with a resistance to fungus picking caterpillars off tomato plants cultivation practice biological control cultural control genetic resistance natural chemicals