Why are enzymes necessary?

A. to slow the rate of decomposition

B. to act as a catalyst in chemical reactions

C. to conserve the stored energy of a cell

In your own words, explain how Earth's magnetic field is created and how it benefits human life.

Which chamber of the heart pumps deoxygenated blood to the lungs?

Since the supercontinent Pangaea split up ~200 million years ago, the continents have remained in essentially the same positions. Do you agree?

Which drug dampens responsiveness to irrelevant stimuli in schizophrenia patients with positive symptoms?

It is the name of the process in which an organism makes a new organism. A. mutation B. fertilization C. variation D. reproduction

Five disease of the kidney

The primary organs of excretion are the A. heart and lungs. B. lungs and kidneys. C. kidneys and liver. D. liver and pancreas.

What is the role of DNA ligase in the elongation of the lagging strand during DNA replication? A) It synthesizes RNA nucleotides to make a primer. B) It catalyzes the lengthening of telomeres. C) It joins Okazaki fragments together.

Which type of cytoskeletal element is described as a solid

Energy related usage in the United States makes up nearly what percentage of human-caused greenhouse emissions? A 57% B 63% C 72% D 85%