it. Life originated on around Earth started about 3.5 billion years ago in the oceans. Today, the number of organisms living there is unknown, merely which is very large and that only a few is known to humans. Around 18 million km² of land are protected globally, but oceans protect only 10% of this area, though oceans cover 71% of the Earth’s surface. The marine ecosystem can be sub categorized as rocky shores, oceans, estuaries, lagoons, mangroves, salt marshes, intertidal zones coral reefs, the…
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