Which of the following has been the primary source of oxygen for the Earth's atmosphere in recent geological times?
A)volcanic eruptions
B)transpiration
C)photodissociation
D)photosynthesis

Question

Quizplus · Accepted Answer

Photosynthesis by plants and other photosynthetic organisms, such as algae and cyanobacteria, is the primary source of oxygen in the Earth's atmosphere. This process involves the conversion of carbon dioxide and water into glucose and oxygen using energy from the sun. Over time, this oxygen has accumulated in the atmosphere, allowing for the development of complex life forms.

Which of the Following Has Been the Primary Source of Oxygen