What need to be recognized by the t cells on the antigen presenting cells before becoming fully activated?

Before becoming fully activated, the t cells must be able to recognize the pathogenic properties of the bacteria, and target it to be destroyed.

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.

the answer is:

carbon dioxide