... and life as a whole??
the question was too long. lol.
is it because the evolution of prokaryotes and eukaryotes are somewhat similar?
help me. i need a full answer
2007-12-18 13:43:26 · 3 answers · asked by ica03 2 in Science & Mathematics ➔ Biology
Well - according to the endosymbiotic theory, some cyanobacteria entered into a symbiotic relationship with some pre-eukaryotic cells ("urkaryotes") and gave rise to the chloroplasts of the first plants.
Also - as others have pointed out - photosynthesis (as performed by both cyanobacteria, and eukaryotic plants) caused the atmosphere to become oxygen-rich. This allowed for aerobic respiration to evolve, and aerobic respiration is significantly more efficient than anaerobic respiration.
Most eukaryotes perform aerobic respiration, as this provides them with more energy, and therefore allows them to do much more cellular activity (as required by their increased complexity).
2007-12-19 00:44:53 · answer #1 · answered by gribbling 7 · 0⤊ 0⤋
Cyanobacteria were probably the first autotrophs or producers to use photosynthesis. They carry on photosynthesis using chlorophyll and they produce lots of oxygen. Oxygen was good for eukaryotes because they could get lots more energy from their food using oxygen.
2007-12-18 13:48:05 · answer #2 · answered by ecolink 7 · 0⤊ 0⤋
They are oxygen producers who raised the oxygen levels in the early atmosphere.
2007-12-18 13:48:10 · answer #3 · answered by Anonymous · 0⤊ 0⤋