Choose your answer from: 1. orientation. 2. species. 3. small. 4. muscle. 5. ferns. 6. host. 7. grow. 8. size.
Given those answer options, answer the question: Fact 1: Cells vary in size as well as shape, but all cells are very small. Fact 2: Cells just vary in their forms and functions. Given the two facts above, cells what as well as shape is related to their forms and functions?
A:
8.