Because of the nitrogen cycle all of the above answers are correct
Even the cell membrane is like the cell wall its flexible and lets certain things in and certain things out.
When the sun is above the horizon and when the sun is below the horizon it is winter
Should be Eukarya, I think
The major food molecule in living organisms is a sugar called glucose. Most carbohydrates (sugars and starches) are converted into glucose before they are broken down in the cytosol to release energy. ... If oxygen is present, then glucose can be broken all the way down into carbon dioxide and water.
