Coloured scanning electron micrograph (TEM) of chloroplasts from a red seaweed (Griffithsia sp.). Chloroplasts are the food producers of the cell. They are cell organelles found only in plant cells and some protists such as algae. Chloroplasts have special photosynthetic pigments (molecules) that convert light energy into sugars that can be used by cells. The entire process is called photosynthesis. Magnification: x4,425 when shortest axis printed at 25 millimetres.
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