Which factor might NOT contribute to an exponential growth rate in a given population?

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.

b

explanation:

answer; ///(b) it is composed of four protein chains and four heme groups;

it's c. (to reduce the greenhouse effect/carbon gasses)