New carpet is being measured for a room that is 5.5 m by 4.6 m. On a measuring tape, what is the smallest unit that is necessary to measure the room accurately for the carpet?
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centimeters

The growth of which of the following usually occurs first in primary succession on a bare rock?
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Lichens

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?
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to recycle nutrients into soil