Which d these statements is true about the oxygen revolution? a- cyanobacteria were the first organisms to introduce oxygen into the atmosphere. b- protocells were the first organisms to produce oxygen in water, which then escaped into the atmosphere. c- cyanobacteria were the first organisms to produce oxygen in water, which then escaped into the atmosphere.

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england