<span>What base attaches to the 5 carbon sugar: this is called Nucleic Acid. This acid is stored, and then is transferred. </span><span />
Chemical reactions involve the reactants' undergoing a chemical change to become products.
Answer: It distributes oxygenated blood to the different tissues, it has to be wide enough to fit everything through as efficiently as it can.
essentially its like a tunnel and tunnels have to be wide to fit everything through
However, I did not pass the test.
Its introduction
