2. Sickle cell anemia is a Option 1: genetic disorder that results in abnormally shaped red blood cells,
Option 2. genetic disorder that results in defective hemoglobin,
Option 3: Options 1 & 2.
Option 4: infectious disease caused by a virus,

The answer is option 3 because people with sickle cell anemia have abnormal hemoglobin molecules that is called hemoglobin S, which stick to one another and form long, rod-like structures. These structures cause red blood cells to become stiff and shape into sickles or crescent moons.

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the form of energy changes and the total energy increases0l

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.