The polar head of a phospholipid is made of phosphate. The polar head has a negative charge that is made up of phosphate molecules. This polar region attracts water and is positioned outward to interact with the water.
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It originally comes from C. DNA
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Answer:
The hydrosphere is made up of mostly fresh water.
Explanation:
ocean water, which is mostly salt water, makes up 97% of the hydrosphere. ... The hydrosphere provides fresh water for drinking. The lithosphere provides soil for growing food and shelter.