Which of the following elements is NOT found in proteins? +
Carbon
Hydrogen
Nitrogen
Sulfur
The building black ormano mercafioroteins. is

cramming before a final is bad because it makes a student's stress level higher. students who embrace cramming to get through a final exam week find themselves struggling to perform consistently, once the brain adjusts to prolonged sleep deprivation.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.