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How do marine animals live? - survival needs in the ocean
All organisms need energy, oxygen, water and shelter to survive. In the ocean, seaweeds harness the energy from the sun to produce carbohydrates, just like plants on land.
Photosynthesis in the ocean: In shallow ocean environments, seaweeds harness energy from the sun to produce carbohydrates (or sugars).
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This process is the one of the most important biochemical pathways, as nearly all life on Earth either directly or indirectly depends on it as a source of energy.
 Chemosynthesis - like photosynthesis without the light
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|Photosynthesis | Chemosynthesis | |
