The evolution of populations due to chance is
a)genetic drift.
b)has more effect in large populations than in small populations.
c)gene flow.
d)natural selection.
e)genetic variation.

answer; ///i believe the answer is (antioxidant);

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.