B positive patients can receive blood from B positive, B negative, O positive and O negative donors.
Answer:
Cell theory states that B) All living things are made up of cells and A) cells come from other living cells.
The answer is, "B", "Developing country".
I think tracheae which is B not sure tho
Breaking bonds takes energy, forming bonds releases energy
If you break more bonds than you form it would be an endothermic reaction