Approximately what percent of the earth’s surface is covered by ocean?

The oceans cover 71 percent of the Earth's surface and contain 97 percent of the Earth's water. Less than 1 percent of the Earth's water is fresh water, and 2-3 percent is contained in glaciers and ice caps. The oceans contain 99 percent of the living space on the planet.

i think that d. wind is the answer.   i missed the question when i answered a. currents.

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?