Van Neil hypothesis about the production of oxygen during photosynthesis was based on the study and investigations on:
Correct answer: A. Bacteria
- A. Bacteria
- B. Algae
- C. Protonema
- D. Cyanobacteria
Explanation
Using evidence from bacteria that utilize hydrogen sulfide (H2S) for photosynthesis, van Niel hypothesized that all photosynthetic organisms need a hydrogen source and that plants split water as their hydrogen source, releasing oxygen. Scientists confinned this hypothesis by using a heavy isotope of oxygen (O18).
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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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