Photosynthetic organisms were present when Earth was primarily anoxic. Why was the appearance of cyanobacteria critical for the oxidation of the atmosphere? a) The early forms of photosynthesis were carried out in the water, and there was no way for the oxygen to move into the atmosphere. b) Cyanobacteria carry out anoxic photosynthesis. c) The early forms of photosynthesis did not produce oxygen as a waste product. d) The early forms of photosynthesis did produce oxygen, but it was not enough to make a difference in the atmosphere.

Photosynthetic organisms were present when Earth was primarily anoxic. Why was the appearance of cyanobacteria critical for the oxidation of the atmosphere? a) The early forms of photosynthesis were carried out in the water, and there was no way for the oxygen to move into the atmosphere. b) Cyanobacteria carry out anoxic photosynthesis. c) The early forms of photosynthesis did not produce oxygen as a waste product. d) The early forms of photosynthesis did produce oxygen, but it was not enough to make a difference in the atmosphere.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter5: Photosynthesis

Section: Chapter Questions

Problem 13CTQ: Why are carnivores, such as lions, dependent on photosynthesis to survive?

See similar textbooks