In Which of the Following Organisms Did the Process of Photosynthesis

Question

In which of the following organisms did the process of photosynthesis most likely originate?
A) land plants
B) prokaryotes
C) fungi
D) unicellular aquatic eukaryotes

Accepted Answer

Photosynthesis most likely originated in prokaryotes, specifically in a group of bacteria known as cyanobacteria. These organisms have been performing photosynthesis for billions of years, long before the appearance of plants and other eukaryotes on Earth.