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Unit 2: The Cell Photosynthesis Review
  1. Plants and other are the of ecosystems and can convert solar energy into the energy in food by a process called .
  2. Heterotrophs are (including decomposers), in the ecosystem, and obtain their energy from other organisms.
  3. Photosynthesis is a process where water is and carbon dioxide is to .
  4. In plants, photosynthesis occurs in organelles called , which contain its own ribosomes and .
  5. There are two major stages: the light reactions and the Calvin cycle (light-independent reactions).
    • The light reactions occur in the , where pigment molecules located in a photosystem absorb light and their electrons reach an state.
    • Each excited electron is passed through an transport chain (ETC) and another photosystem, where the energy is used to produce and reduce NADP+ to .
    • The Calvin cycle occurs in the to synthesize from carbon dioxide.
  6. C4 plants are adapted to hot, dry climates by incorporating CO2 into -carbon as the substrate in the Calvin cycle.
  7. The production of carbon compounds from CO2 is called fixation.
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