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27/09/2020 12:16 pm
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An ecosystem, such as an aquarium, is self-sustaining if it involves the interaction between organisms, a flow of energy, and the presence of
(a) equal numbers of plants and animals
(b) more animals than plants
(c) materials cycles
(d) pioneer organisms
1 Answer
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27/09/2020 12:17 pm
(c) materials cycles
Explanation:
If a ecosystem is to be self-sustaining, materials such as oxygen, carbon dioxide, water and nitrogen must to recycle between the organisms.