Concentration gradient= the difference in the concentration of a substance between two areas.
<span>The different populations in a community can communicate in different kinds of connections with each other. Example include symbiosis, parasitism, commensalism</span>
Answer:
They both have unusual orbits.
Explanation:
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The linea alba is the band of connective tissue that separates the rectus abdominis.
False,<span>The exchange of oxygen and carbon dioxide between the air and the bloodstream occurs in the</span>alveoli of the lungs.
