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NEPHRONS ARE THE FUNCTIONAL AND STRUCTURAL UNIT OF KIDNEYS...
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Answer:
The hemoglobin molecule has four binding sites for oxygen molecules: the iron atoms in the four heme groups. Thus, each Hb tetramer can bind four oxygen molecules.
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Answer: More humans consume more freshwater, more land, more clothing, etc. The more people on the planet, the more food you need to feed those humans. Which can also cause more deforestation to create more space.
These molecules - proteins, lipids, carbohydrates, and nucleic acids - make up every component in living things. Lipids are used as energy and form making membranes that all living things have. Carbohydrates are the primary source of energy for many living things. Proteins are used to build tissues or enzymes. Nucleic acids are used for the genetic material to be transferred to offspring.
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