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Cell membranes serve as barriers and gatekeepers. They are semi-permeable, which means that some molecules can diffuse across the lipid bilayer but others cannot.
Photosynthesis, the process whereby plants use light from the Sun to convert CO2 into organic compounds such as sugars, and oxygen, is one of the most important natural processes on Earth. This is a sophisticated system with a highly regulated shuttle traffic of ions and molecules that passes through several membranes. I hope I helped you and good luck and I am sorry I know it’s late at night it’s just I love to help people and I ate to much sugar
Answer:
C
Explanation:
As the Earth moves in relative to the moon the Earth blocks part of the sun from the moon causing only parts of the moon to light up. This BEST answers the question because B is not accurate because it doesn't describe why we actually SEE it. A might be true but it is not the BEST explained.
Hope this helps! (^-^)
Green house gases gives out. Carbon dioxide more than oxygen.... nitrogen stays the same as greenhouses gas does take in or give out
