Answer: A
Explanation: The elements in the compounds get rearranged. You can't change the amount of hydrogen, oxygen, or carbon the product contains
Your answer would be The microorganism was unicellular and had a well-defined nucleus.
Since mitosis is the division of cells, in this case, skin cells, it allows the dead skin cells to fall off. Also, mitosis can fix any injuries. Without mitosis, these things would not happen.
B is the answer if not B then C
possessing characters of both sexes and especially both male and female reproductive structures
hope this helps.