Animals are classified as because they use as their carbon source.

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.

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

answer: 45

explanationyou have to add as well to be it could be

not sure if this is what you'r looking for eubacteria and archaebacteria