Bothe b cells and t cells
Our face have very important nerves and if cuts or any injuries aren't treated quick the face might be very hard to work on and also it might need plastic surgery
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People with type O- blood are called universal donors because their donated red blood cells have no A, B or Rh antigens and can therefore be safely given to people of any blood group.
Answer:
15d, 16 I want to say C but A also could be the correct answer,17 A
Explanation: