Photosynthesis and Respiration
Carbon fixation requires the expenditure of ATP molecules which is generated by

formation of glucose during the Calvin cycle
replenishment of chlorophyll
ETS (electron transfer system) during the light reactions
None of these

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Photosynthesis and Respiration
Which of the following statements about energy metabolism is false?

The energy that powers living systems ultimately comes from the sun
Plants provide the water and CO2 that animals need to carry out respiration
All animals in some way rely on plants for their energy
All eukaryotic organisms carry out respiration in the presence of O2

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