What does biodiversity prevent?

spend time removing introduced species, which can mean physically weeding invasive plants or trapping invasive animals. ... Others work to reduce harvesting directly or to reduce the incidental catch of nontarget species.

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many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.