The answer to this would be d. :)
Answer:
Evolution
Explanation:
Evolution – change over time. It is the process by which modern organisms have descended from ancient organisms. Current scientific facts, observations and hypotheses all combine to create current evolutionary theory – which is a well-supported, testable explanation of the biological diversity on Earth.
1.cell membrane
2.Cell startation
3.cell fusion
4.cell reconstruction
5.tissue replacement
6.red blood cells
