DNA codes for which determines
(a) proteins, peptide bonds
(b) mRNA, tRNA
(c) mRNA, ribosome
(d) protein s, traits

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

When a person is exercising the body needs to deliver increased amounts of oxygen to the muscles which component of blood ensures that the muscles will receive it