Abriefly explain the genetic and evolutionary implications of lederberg and lederberg’s (1952 finding that mutations adapted to particular culture conditions (e. g., the presence of antibiotics existed before the selective culture conditions were imposed. b how did “replica plating” contribute to this conclusion?

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

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.