The answer is D
hope this helps
Answer:
The cardiovascular system helps maintain homeostasis by continually supplying the central nervous system--the brain and spinal cord--with oxygen and glucose. Brain cells start dying after just one minute without oxygen. The brain is the control center for all of the body's homeostatic processes.
After a molecule of DNA replicates, two double-stranded molecules are formed. This results in a total of four strands of DNA.
Answer:
ji!\uuisdrhttojejltjegbkflccbdnmcifhgagaakpot