Charles darwin's book on the origin of species (1859) was considered an important contribution to modern science because it:

The answer is it synthesized information from diverse scientific fields in order to document evolutionary change. The book introduced the concept ‘survival for the fittest’ which is the basis for natural selection. In addition from accumulated evidence from research papers, the Beagle expedition to the Galapagos islands contributed to his findings.

b. heterotroph

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.