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Aristotle believed that objects falling to the ground fall at a constant rate of speed.
Ribosomes
Organelles found in all living cells that are responsible for protein synthesis, decoding the message and forming peptide bonds.
Nucleolus
Somewhat rounded, dense, well-defined nuclear body with no surrounding membrane; contains ribosomal RNA and protein. Plural: Nucleoli.
Endoplasmic Reticulum
An organelle in eukaryotic cells that plays a key role in protein and lipid synthesis and transport.
Nuclear Envelope
Double membrane structure surrounding and enclosing the nucleus.
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