raccogliere fetta riferimento plants need oxygen Tirannia è bellissimo metropolitana
Photosynthesis: What is it and how does it work? | BBC Science Focus Magazine
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Biology Reading Flashcards - Photosynthesis | Ask A Biologist
What is the role of photosynthesis and decomposition in the oxygen cycle? - Quora
ROOT RESPIRATION: WHY PLANTS NEED OXYGEN TO THRIVE
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Root Respiration: Why plants need oxygen to thrive
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Plants People and animals need oxygen to live. Green plants make the oxygen in the air we breathe. How do plants make oxygen? Plants take in carbon dioxide. - ppt video online
Photosynthesis - Wikipedia
Thunderbolt Kids
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What is Photosynthesis | Smithsonian Science Education Center