Pulmonary artery carry deoxygenated blood while are there arteries carry oxygenated blood.
pulmonary vein carries oxygenated blood while the other veins carry deoxygenated blood
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Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species.
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Mountains are cooler than plains because with increase in height the temperature decreases. EXPLANATION: Mountains are located in high elevations and plains are located in low elevations. Their respective heights are measured by term called as their height above sea level.
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i have put an image for a diagram of the heart in the answers becuase you did not provide a diagram so i hope this helps
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