File:Plankton.jpg
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"Phytoplankton obtain energy through the process of photosynthesis and must therefore live in the well-lit surface layer (termed the euphotic zone) of an ocean, sea, lake, or other body of water.
Phytoplankton account for half of all photosynthetic activity on Earth.
Thus phytoplankton are responsible for much of the oxygen present in the Earth’s atmosphere – half of the total amount produced by all plant life."
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current | 18:48, 5 October 2013 | 400 × 259 (34 KB) | Siterunner (talk | contribs) |
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