Mitosis is when a single cell splits apart and creates two new cells that are identical to the parent cell.
Answer:
rebuilding of body tissues
Explanation:
protein can diverse when it converted to amino acid,
A closed system is a system that makes no physical or chemical exchanges with its environment. Of these systems provided as choices (tree, human, clock, car), only a clock does not make exchanges with the environment, except for energy.
Therefore, of that list, only a clock would be a closed system.
Hope that helped! =)
What was the investigation? But from my best guess I'm assuming it's the second option. This may be incorrect.