Phosphorous enters the biotic (living) cycle mostly by (hint: like water) * A. decomposition by de-nitrofying bacteria..

B. being absorbed by plant leaves from the atmosphere and photosynthesis.

C. being absorbed from the atmosphere by nitrogen fixing bacteria.

D. uptake and assimilation by plant roots and through animals eating..

I think the correct answer is option ( A )

Explanation:

I'm not sure

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.