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Life on the Earth
Photic zone : The vertical zone of the ocean are determined by availability of light for photosynthesis. The lighted upper 200 metres forms the photic zone.
Aphotic zone : The next zone upto the depth of 2000 metres gets less light which is insufficient for photosynthesis. This layer is called aphotic zone.
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Who are decomposer? State two scavengers.
What are two types of ecosystems?
Mention the classes of the aquatic ecosystem.
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