Answer: rolling friction, air resistance.
Explanation:I just took the test on apex
6-C (breaks off)
7-C(they secrete acid that breaks away rocks)
Cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.
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Answer: Negative feedback serves to reduce an excessive response and to keep a variable within the normal range. Negative feedback loops control body temperature and the blood glucose level.
Answer: intraspecific competition
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