Sickle cell anemia is a genetic disease with severe symptoms, including pain and anemia. The disease is caused by a mutated version of the gene that helps make hemoglobin a protein that carries oxygen in red blood cells. People with two copies of the sickle cell gene have the disease.
Answer:
20
Explanation:
hope it helps and hope im right
(wrong answer)
The invention of microscopes changed the way cells were able to reproduce.
Answer:
This an invalid scientific conclusion because the other variables were not accounted for.