1. Nutritional type of microbe? 1. 1 A distinction should be made between the Heterotrophic and Autotrophic Organic compounds 1.2 Carbon source Carbon dioxide Organic molecule 1. 3 Energy source Light or chemistry energy1.Nutritional type of microbe? ◼ 1. 1 A distinction should be made between the Heterotrophic and Autotrophic. ◼ 1.2 Carbon source ◼ 1.3 Energy source Organic molecule Light or chemistry energy Organic compounds Carbon dioxide