Which of these is a red blood cell?, , , , , What do sperm cells swim towards?, The lungs, The Liver, The egg, The heart, Which of these organelles only appear in plant cells?, Chloroplasts, Nucleus, Cell membrane, Cell wall, What do mitochondria control in a cell, fun, genetic information, respiration, killing off bacteria, What does a tail allow a sperm cell to do, eat, swim, do the worm dance.

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