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Primitive heterotrophs slowly evolved complex biochemical pathways which enabled them to use a wider variety of nutrients -evolved anaerobic respiratory process to convert nutrients into energy -photosynthesis and autotrophic nutrition was developed

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1. Primitive heterotrophs slowly evolved complex biochemical pathways which enabled them to use a wider variety of nutrients -evolved anaerobic respiratory process to convert nutrients into energy -photosynthesis and autotrophic nutrition was developed





 
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