| 21. | Picoeukaryotes can be either autotrophic and heterotrophic, and usually contain a minimal number of organelles.
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| 22. | Microrganisms present are heterotrophic and autotrophic.
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| 23. | Many authorities who find it impossible are clearly citing sources for complex autotrophic self-replicating systems.
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| 24. | This pathway is also used for carbon fixation by autotrophic sulfate-reducing bacteria and hydrogenotrophic methanogens.
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| 25. | Ferric iron ( ) is a widespread anaerobic terminal electron acceptor both for autotrophic and heterotrophic organisms.
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| 26. | They are termed autotrophic because of their carbon source and termed aerobes because of their aerobic environment.
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| 27. | The plants are herbs, partially autotrophic ( photosynthetic ) but also partially parasitic on soil fungi.
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| 28. | Heterotrophic microorganisms are important in oxidising carbon ( decomposition ) whereas autotrophic microorganisms are important in nitrification.
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| 29. | In general, since these systems are autotrophic, they are the most difficult and complex known replicators.
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| 30. | These systems are substantially simpler than autotrophic systems, because they are provided with purified feedstocks and energy.
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