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PGA as the first CO2 fixation product was discovered in photosynthesis of :

1. Bryophyte
2. Gymnosperm
3. Angiosperm
4. Alga

Correct answer: Alga

Solution

PGA (3-phosphoglyceric acid) was identified as the first stable product of CO2 fixation in the Calvin cycle using algae, especially Chlorella. These experiments revealed the early steps of carbon fixation in photosynthesis.

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