Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the in the exchange of gtp for gdp. once activated, the gtp cannot be hydrolyzed and ras cannot be deactivated. what is one potential outcome of a mutation in one of the two copies of ras?

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.