Food webs show feeding relationships among different types of organisms. those organisms each have a specific niche which of the following best describes a function of decomposers in food webs. to recycle nutrients in soil to convert solar energy into food to provide food for secondary consumers to compete with secondary consumers for oxygen

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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.