Afire suppression system that is safe for equipment, but dangerous for humans is

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.

Why is the limitations on supplies of freshwater becoming an increasing problem despite the fact that we have desalination technologies

Which of these is the best source of stem cells and minimizes the risk with cell transplantation