Mutations have an important role in how species change over time.
Answer:
A scientific hypothesis must be testable, and;
A scientific hypothesis must be falsifiable.
Explanation:
I looked it up o-o sorry if its wrong. :3
Group of tissues performing a specific task is known as organ and group of organs performing a specific task is organ system.
A small cell lived inside a larger cell to the benefit of both cells.
Hope this helps!
