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Why do scientists consider pikaia to be an early chordate and not a worm
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Differentiation of cells changes the nucleic information. true false
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Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.
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Why do scientists consider pikaia to be an early chordate and not a worm...
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