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26 April, 07:22

Why is oxygen not essential to all living things?

Oxygen is used for breathing by only animals

Oxygen is a waste product of photosynthesis so is not needed by plants

Oxygen is harmful to plants and bacteria

Oxygen is harmful to fungi and algae

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  1. 26 April, 07:48
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    Oxygen is a waste product of photosynthesis so is not needed by plants

    this would be the right answer
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