Which of the following is true of enzymes?

a. An enzyme is consumed during a chemical reaction.
b. An enzyme is converted to a product during a chemical reaction.
c. An enzyme lowers the energy of activation required for a given reaction.
d. An enzyme catalyzes a number of different chemical reactions.

Plz ! cattle ranchers and dairy farmers rarely allow all of their animals to reproduce instead they practice selective breeding and only encourage the reproduction of animals with specific features. which of the following cows would a dairy farm most likely choose to reproduce? a. a cow that makes a lot of milk. b. a cow that can run quickly. c. a cow with a think, soft fur. d. a cow with large, strong hooves.

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16