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Many kangaroo rats live in the sonoran desert of the southwestern united states. they have a variety of adaptations for living in the desert. under which circumstance would the kangaroo rats of the sonoran desert be most likely to develop new adaptations by natural selection?

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

In what for do plants utilize nitrogen? why do they need nitrogen?