AMI IMAGES / SCIENCE PHOTO LIBRARY AMI IMAGES / SCIENCE PHOTO LIBRARY
Chloroplasts. Transmission electron micrograph (TEM) of a section through a hypocotyl from a thale cress (Arabidopsis thaliana) plant, showing chloroplasts (bright green). Chloroplasts are the site of photosynthesis in plants and algae. The hypocotyl is the stem of a germinating seedling.
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