What is the gateway to the digestive system?

Lower esophageal sphincter.

Explanation:

The gateway to the digestive system is lower esophageal sphincter. This ring like muscle open

and closes the passage between our esophagus

and our stomach, as needed. During the digestive process, the sphincter relaxs and lets food pass into our stomach.

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.

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction