This represents the anaerobic part of cellular respiration, this specifically would represent the Krebs cycle. I highly doubt that they want you to be that specific, so Cellular respiration
All cells have a nucleus in the middle of it (Hope that helps)
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They can use these printers to make replica or identical copies of things like fossils. Theses are mostly useful because real fossils are rare so they can still study them without possibly ruining an artifact.
Explanation:
