a. respiration of living organisms
D. absorption of CO2 from the atmosphere by ocean water
DNA contains instructions for how cells come together
I believe that both flatworms and roundworms have a body type called Bilateral symmetry. Animals that are bilaterally symmetric have mirror symmetry in the sagittal plane, which divides the body vertically into left and right halves, with one of each sense organ and limb pair on either side.
Ur intercostle muscle between ur ribs
