Given that two thirds of the Earth's surface is water and that marine life lives at all levels of the ocean

Câu hỏi :

Given that two thirds of the Earth's surface is water and that marine life lives at all levels of the ocean, the total three-dimensional living space of the ocean is perhaps 100 times (30) _____ than that of land and contains more than 90 percent of all life on Earth even though the ocean has fewer distinct species.