Edexcel OLevel Biology revision notes

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Lesson

Lesson-4.2.4- understand why only about 10% of energy is transferred from one trophic level to the next.

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Lesson-4.2.3- understand the transfer of substances and energy along a food chain.Previous Lesson-4.3.1- describe the stages in the carbon cycle, including respiration, photosynthesis, decomposition and combustion.Next