The light-colored peppered moth was a dominant species in England prior to the industrial revolution. With an increase in the black soot produced by industries, more dark-colored peppered moths began to appear in areas where trees were covered by soot. Gradually, the dark-colored moths dominated the population by over 98%. What is one explanation as to why natural selection resulted in the presence of more dark-colored moths over time?

A. The light-colored moths were eaten by birds in larger quantities because they tasted better.
B. The light-colored moths were not able to survive the soot-polluted environment.
C. The dark-colored moths were resistant to the pollution due to a gene mutation.
D. The dark-colored moths were better camouflaged so they were not eaten by birds as often.

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.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.