<span>Carbon is the building blocks of all living molecules. With the ability to form carbon-carbon bonds, many different compounds formed into different structures can be used for different purposes such as macromolecules. </span>
2. solar system 1. is elliptical
Answer:
The atmosphere
Explanation:
Most of the air travels through the atmosphere tho very little travels through the ocean from air vents, or scuba diver oxygen tanks.
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Her body compensate for imbalance by Kidney retain bicarbonate ions .An increase in hydrogen ion in the body causes the kidney excrete more acid.These lowers the PH of the blood since hydrogen ion are increased while bicarbonate ion are decreased
