A eukaryotic cell is classified this way if it B. contains a nucleus. In biology the definition of eukaryotic is "having a true nucleus" which is how to depict a prokaryotic cell from a eukaryotic cell.
Fish is good to lowering blood pressure because contain vitamin D, and this hormone-like vitamin has properties that can lower blood pressure.
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<h2>A. Keeping a body healthy from disease</h2>
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Instead of a brain, echinoderms have a ring of nerves located around their mouth area that governs their nervous responses. This ring coordinates their motion, their eating, basically anything that requires nerve control.
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