alleryPhotosystems are numbered by:
AOrder of electron flow
BSize of complex
CPosition in leaf
DOrder of discovery
Answer & Solution
Correct answer: D. Order of discovery
1. Electrons actually flow from PSII to PSI.
2. The numbers follow order of discovery.
3. Both sit in the thylakoid membrane.
_Source: OpenStax Biology 2e, Chapter 8, Photosynthesis (CC BY 4.0)._
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