Aresearcher is culturing cells that require oxygen to live in an incubator where the gas levels are carefully regulated. if the researcher observes that the po2 in the incubator is 200 mmhg, what can the researcher deduce about the po2 of her cells?

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.