McqMate
| Q. |
Maximum oxygen is available from – |
| A. | Deserts |
| B. | Green forests |
| C. | Grass lands |
| D. | Phytoplanktons |
| Answer» D. Phytoplanktons | |
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Explanation: Most of Earth's oxygen comes from tiny ocean plants - called phytoplankton - that live near the water's surface and drift with the currents. Like all plants, they photosynthesize - that is, they use sun-light and carbon dioxide to make food. Scientists believe that phytoplankton contribute between 50 to 85 percent of the oxygen in Earth's atinctspbere (National Geographic) |
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