Semi-conservative replication refers to a. each base bonding at the 1' position of the sugar. b. a purine always bonding to a pyrimidine. c. one helix strand that runs from the 5' to 3' direction and the other strand runs from the 3' to 5' direction. d. an original parent dna strand and one newly synthesized dna strand comprising a new dna molecule. e. none of the choices is correct.

D) An original parent DNA strand and one newly synthesized DNA strand comprising a new DNA molecule.

Explanation:

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

i would say it is