Tudsamfa , 8 days ago

You are correct, but that doesn't mean I can't speculate about it.

The ability to do photosynthesis is widely distributed throughout the bacterial domain in six different phyla, with no apparent pattern of evolution., according to this random paper I found on the internet (I'm not a biologist either).

What I can glance is that photosynthesis has (probably) evolved independently 6 time in Bacteria and 3 times in Eukaryotes.

Plants evolved to photosynthesise after photosynthesising bacteria already existed for billions of years.

(But then we have to also acknowledge that multicellular life evolved like 25 times in Eukaryotes, and the Eukaryote - aka Mitochondria-"Powerhouse of the cell"-haver- is the real big step as it only happened once to our knowledge).