The CNS involves the brain and spinal cord and the PNS involves the body nerves.
Answer:
Explanation:
Cancer is a disease of uncontrolled cellular growth. Your body has many mechanisms in place to prevent a cell from dividing uncontrollably. But when the DNA of a cell is mutated, the proteins that govern cell cycle activity can be changed, and a cell may be able to circumvent the body's mechanisms
The answer is B.
It describes the relationship between photosynthesis and respiration accurately.
Answer:
The heart valves
Explanation:
The heart valves prevent blood from flowing in the wrong direction in the heart. The valves are held in the proper place because of the chordae tendinae.
They don't need to be near water for reproductive purposes!
