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Nutrient Cycles
All nutrient cycles have once sequence:
1) Nutrient is taken up by producers as simple, inorganic molecules.
2) Producer incorporates nutrient into complex organic molecules.
3) When the producer is eaten, the nutrient passes into consumers.
4) Nutrient then passes onto secondary, tertiary or quaternary consumers.
5) When…

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Summary Questions p.90
1) The carbon dioxide concentration of the atmosphere is less on a
summers' day than on a winters' day because more plants are
photosynthesising in summer. This is because light is required for
photosynthesis, and more light is available in summer, therefore the
light dependent reaction can…


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