B. Because of the presence of hydrogen sulphide in Brass, it combines with oxygen in air and form water, evaporates. So remained sulphide is colourless in air .So Brass gets discoloured in the air.
Primary= peptide bonds
secondary= hydrogen bond
tertiary= weak bonds, hydrophobic, disulfide bridges, salt bridges
quaternary= between polypeptides
I think it might be the second one sorry if I’m wrong
Chromosomes. Hope this helps.
Answer: The answer is D. Hope this helps :)
Explanation:
