Think about the lab procedure you just read. Label each factor below V if it was variable during the procedure or C if it was constant.

as many times as you want

the backbone of the dna and rna compound is sugar phosphate.

youre right there are

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.