If reproduction didn't exist, all species would eventually go extinct.
Answer:
A. red blood cells containing malaria
Explanation:
Also, just as a heads up. I saw the previous person posted a link. Remember not to click any links that lead to domains which are unknown to you. They could hold a virus.
He discovered the theory that cells are created from the division of cells. He discovered many things related to cellular theory, pathology, and social medicine. He also discovered leukemia.
