Photosynthesis is absent in:
Correct answer: B. Mushrooms
- A. Seaweeds
- B. Mushrooms
- C. Purple sulphur bacteria
- D. Angiosperms
Explanation
Mushrooms, being fungi, do not have chlorophyll and therefore cannot perform photosynthesis. Seaweeds, purple sulphur bacteria, and angiosperms all contain pigments that allow them to conduct photosynthesis, albeit through different mechanisms. Seaweeds and angiosperms use chlorophyll, while purple sulphur bacteria utilize bacteriochlorophyll, enabling them to harness light energy to create food.
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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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