It's either hydrogen or nitrogen
The answer is immune system
Transfer RNA and amino acids
Answer: A, B, and C are correct.
Polar attractions are (a) forces between atoms of partial charges.(b) weaker than covalent bond.(c) they are numerous.
Explanation:
Polar attractions take place between atoms with partial charges. They are weaker than covalent bond and numerous of them occur in the living cells. They can form between H and other electronegative atoms like oxygen provided they have strong partial charges.
