What was the Great Oxygenation Event? Group of answer choices

when cyanobacteria began producing large quantities of oxygen through the process photosynthesis

when oceans and land mass oxygen reservoirs became full and free oxygen began to build up in the atmosphere

when the percentage of oxygen in the atmosphere rose to 35% 300 million years ago

when fish and amphibians began to breath oxygen 85 million years ago

Look at the bean data from days 4–6. use these data to explain how natural selection changed the number of dark red walking beans over time. writing part

Ill give brainiestif one neutron initiates a fission event that produces two neutrons in the products, how many new reactions can now be initiated? if each of the neutrons produced in the first fission event then initiates a fission event that produces one neutron in the products, how many new reactions can now be initiated by each neutron? how many neutrons in total were produced by the two fission events described?

List the path of the respiratory system