The relationships between earth's various systems affect everything from climate to formation of landforms. which statement best describes the relationship between earth's hydrosphere and atmosphere? a) varied land temperature is a result of the spheres' interaction, which affects weather patterns. b) earth's tectonic plates are affected by this relationship, which can create earthquake activity. c) the spheres' interaction affects global sea temperatures, resulting in the formation and melting of ice. d) the interaction between the spheres affects elevated landforms, and is responsible for volcano eruptions.

THE LETTER IS C OBVIOUSLY.

yes the answer is C

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.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).