8. Arteries carry oxygenated blood from the heart to the rest of the body, while veins carry deoxygenated blood from the body, back to the heart. Arteries are thick and muscular, while veins aren't as thick, and they have valves.
The mRNA needs to copy the gene sequence of the dna before it leaves the nucleus to the tRNA and rRNA
the answer is B: It is made up of amino acids.
Option - IT IS BASED ON PREDICTION
because they have not had any way of telling where or when it has happened or occurred so you must predict how it happens or works.
hope this helps
