Aquatic ecosystem covers how much of the earth's surface?
A
87%
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B
23%
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C
72%
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D
49%
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Solution
The correct option is C 72% About 72% of the land on the Earth is a part of the oceans. This water of the oceans, rivers, lakes and ponds contribute to the aquatic ecosystem. So, about 72% of the Earth's surface is covered under the aquatic form of ecosystems. There are two types of aquatic ecosystem, freshwater and marine ecosystem.