The answer is all of the above.
What is sickle-cell trait?
Red blood cells with sickle cell disease are bent rather than spherical because it is an inherited blood ailment. Small blood vessels are blocked by these curved red blood cells. Organ damage and suffering may result from improper blood flow.
Option e (all of the above) is the correct choice.
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Gravity, if it isn't and answer please comment back and tell me
Answer:
The cell divides into two cells
Explanation:
Convection causes heating in troposphere because it drops in temperature with altitude, but has a relatively high density of air. The stratosphere has no weather because convection cannot happen because the air gets hotter in this layer as you go up in altitude.