Biology, 24.04.2020 22:46 ghkfkhgm859
Cyanobacteria are thought to have introduced oxygen into the early atmosphere. This was important because oxygen played a key role in . creating an ozone layer to shield life from UV rays the evolution of eukaryotic organisms the greenhouse effect recycling of essential materials the water cycle
Answers: 2
Another question on Biology
Biology, 21.06.2019 19:30
What makes the results of a scientific experiment accurate? a) having multiple trials b) lacking any supporting data c) working in a lab d) using a hypothesis that is always true
Answers: 2
Biology, 22.06.2019 00:40
Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation
Answers: 1
Biology, 22.06.2019 03:00
Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .
Answers: 1
You know the right answer?
Cyanobacteria are thought to have introduced oxygen into the early atmosphere. This was important be...
Questions
Mathematics, 11.12.2020 01:00
Health, 11.12.2020 01:00
Mathematics, 11.12.2020 01:00
Arts, 11.12.2020 01:00
Mathematics, 11.12.2020 01:00
Biology, 11.12.2020 01:00
Business, 11.12.2020 01:00
Mathematics, 11.12.2020 01:00
Mathematics, 11.12.2020 01:00
Mathematics, 11.12.2020 01:00
Mathematics, 11.12.2020 01:00
