13.1 Food chains and energy transfer
13.2 Energy transfer and productivity
13.3 Nutrient cycles
13.4 Use of natural and artificial fertilisers
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13.5 Environmental issues concerning use of nitrogen-containing fertilisers
Section 5 - Energy transfer in - Chapter 13 - Energy & ecosystems - Practice questions with Answers
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End of Section 5 - Energy transfer in and between organisms - Summary , Practice questions & Answers
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