The answer to number 14 is earth worms
Synergism.
Synergism happens when two or more chemicals enter the body and create adverse side effects/health concerns because of their use together. The effects of the two chemicals together is greater than the sum of the effects of the two individual chemicals.
To prevent blood flowing back after each heartbeat. They ensure that the blood flows only in one direction (back to the heart).
Oxygen, sulfur, nitrogen, and hydrogen!
Answer:
C) is correct
Explanation:
The United States has a smaller population than China, but has a higher per capita greenhouse gas emission, resulting in a larger carbon footprint on a national level.
