We are dependent on photosynthesis because photosynthesis is an essential process in our natural environment that helps to sustain plant life, produce oxygen, reduce Co2, and promotes human and animal well-being.
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They allowed scientists to study heredity and further develop it
Water molecules are polar. This means that one end of the molecule is positively charged, while the other is negatively charged. Opposite charges attract. Water molecules on the faucet that are eventually pulled away from the others by gravity will themselves pull together and form round drops because the charged portions of molecule attract the oppositely charged portions of another.
It was exposed to oxygen. This is called oxidation and it's a chemical reaction, meaning it can't be reversed.
