Why is the ozone layer important to living organisms?

The hole in the ozone layer is improving the Earth's condition.
It provides oxygen for anaerobic bacteria.
It prevents too many of the sun's UV rays from reaching Earth.
All of the above.

Answer

The answer is, "It prevents too many of the sun's UV rays from reching Earth"

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.