Hourly Forecast Detailed. 1  0am:The Santee, SC forecast for Apr 11 is 63 degrees and Clear. There is 74 percentage chance of rain and 4 mph winds from the South-Southeast. 2  3am:The Santee, SC forecast for Apr 11 is 55 degrees and Clear. There is 79 percentage chance of rain and 4 mph winds from the South.
Most Important Organism? Marine plants produce between 70 and 80 percent of the oxygen in the atmosphere.
Since there isn't much information about which differences you want to know about their roles for life. So let's start with oxygen which for the most part exists as molecular oxygen OÂ² which is O=O. Oxygen makes up about 21% of the air we breathe. It can be produced by photosynthesis using sunlight, water and Carbon Dioxide through a number of processes for a different post. Oxygen is used in our bodies with glucose to produce energy and water. This energy is then used throughout the body where needed.