the energy used in photosynthesis is obtained in photosynthetic reaction center proteins.
the energy used in photosynthesis is obtained in photosynthetic reaction center proteins.
in what kind of proteins is the energy used in photosynthesis obtained?
photosynthetic reaction center
the main source of oxygen in the atmosphere is oxygenic photosynthesis, and its first appearance is sometimes referred to as the oxygen catastrophe. geological evidence suggests that oxygenic photosynthesis, such as that in cyanobacteria, became important during the paleoproterozoic era around 2 billion years ago. modern photosynthesis in plants and most photosynthetic prokaryotes is oxygenic. oxygenic photosynthesis uses water as an electron donor, which is oxidized to molecular oxygen () in the photosynthetic reaction center.









































timeline of photosynthesis on earth 









































section::::symbiosis and the origin of chloroplasts.
evolution of photosynthesis
if the defensive players put out one baserunner during the same play in which a batter grounds out, the defensive team records a "double play". there are other means of recording a double play that do not entail a ground out.









































section::::triple play.









































if the defensive players put out two baserunners during the same play in which a batter grounds out, the defensive team records a "triple play", the maximum possible outs that can be recorded on a single play. there are other means of recording a triple play that do not entail a ground out.
ground out (baseball)