Researchers are studying the abnormal activity of kinases in relation to cancer. Theoretically, how might researchers use signal transduction pathways to influence the environment of cancer cells for treatment? a Disrupt the function of protein kinases involved in cell cycle regulation
b Inactivate epinephrine receptors on cancer cells
c Stimulate production of cAMP in cancer cells
d Alter G protein-coupled receptors involved in cell cycle regulation to be active in the absence of their normal signaling molecules

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.