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  2. Photoautotroph - Wikipedia

    en.wikipedia.org/wiki/Photoautotroph

    Cyanobacteria is the only prokaryotic group that performs oxygenic photosynthesis. Anoxygenic photosynthetic bacteria use PSI- and PSII-like photosystems, which are pigment protein complexes for capturing light. [5] Both of these photosystems use bacteriochlorophyll. There are multiple hypotheses for how oxygenic photosynthesis evolved.

  3. Autotroph - Wikipedia

    en.wikipedia.org/wiki/Autotroph

    An autotroph is an organism that can convert abiotic sources of energy into energy stored in organic compounds, which can be used by other organisms. Autotrophs produce complex organic compounds (such as carbohydrates , fats , and proteins ) using carbon from simple substances such as carbon dioxide, [ 1 ] generally using energy from light or ...

  4. Phototroph - Wikipedia

    en.wikipedia.org/wiki/Phototroph

    It is a common misconception that phototrophs are obligatorily photosynthetic. Many, but not all, phototrophs often photosynthesize: they anabolically convert carbon dioxide into organic material to be utilized structurally, functionally, or as a source for later catabolic processes (e.g. in the form of starches, sugars and fats).

  5. Primary nutritional groups - Wikipedia

    en.wikipedia.org/wiki/Primary_nutritional_groups

    -autotroph: Photo litho autotroph: Some bacteria (cyanobacteria), some eukaryotes (eukaryotic algae, land plants). Photosynthesis. Breaking Chemical Compounds Chemo-Organic-organo-Organic-heterotroph: Chemo organo heterotroph: Predatory, parasitic, and saprophytic prokaryotes. Some eukaryotes (heterotrophic protists, fungi, animals) Carbon ...

  6. Photosynthesis - Wikipedia

    en.wikipedia.org/wiki/Photosynthesis

    Photosynthesis usually refers to oxygenic photosynthesis, a process that produces oxygen. Photosynthetic organisms store the chemical energy so produced within intracellular organic compounds (compounds containing carbon) like sugars, glycogen , cellulose and starches .

  7. Nutrition - Wikipedia

    en.wikipedia.org/wiki/Nutrition

    Nutrition is the biochemical and physiological process by ... Mixotrophs are organisms that can be heterotrophs and autotrophs, ... Schematic of photosynthesis in ...

  8. Mixotroph - Wikipedia

    en.wikipedia.org/wiki/Mixotroph

    D: Phototrophy is most common nutrition type, phagotrophy only used during prolonged dark periods, when light is extremely limiting. An alternative scheme by Stoeker [18] also takes into account the role of nutrients and growth factors, and includes mixotrophs that have a photosynthetic symbiont or who retain chloroplasts from their prey. This ...

  9. Ecosystem respiration - Wikipedia

    en.wikipedia.org/wiki/Ecosystem_respiration

    Cellular respiration is the overall relationship between autotrophs and heterotrophs.Autotrophs are organisms that produce their own food through the process of photosynthesis, whereas heterotrophs are organisms that cannot prepare their own food and depend on autotrophs for nutrition.