When the grand canyon was forming, a population of squirrels were separated into two groups. the north side of the canyon is at a higher elevation and experiences more rainfall than the south side of the canyon. the two squirrel species you see here had a common ancestor, but over time, have evolved into two different species. how did natural selection lead to different species?

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a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a