It is impossible for life to evolve without what crucial task?

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

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.