1 point What occurred when photosynthetic began to pump free oxygen into the
oceans?
Organisms immediately developed the ability to breath oxygen
Organisms living at the time were unaffected by oxygen production
It led to a mass extinction of nearly all life on the planet
It led to an increase in global temperature

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

i'm wiling to try and you : )