Anoxygenic photoautotroph requires

Name the first oxygenic photoautotrophic organism. What was the effect of evolved oxygen on atmospheric gases of reducing atmosphere of that period ?

vision requires

Anoxygenic photosynthesis does not involve

Anoxygenic and oxygenic photosynthesis are respectively shown by

Name the first oxygenic and aerobic photoautotrophs formed.

Who were first oxygenic and aerobic photoautotrophs ?

What are photoautotrophs?

Photoautotrophic bacteria have

Photoautotrophic bacteria have