- Julie sees commercials for antibacterial products that claim to kill almost all the bacteria in the area has been treated with the product. Julie asks, "How effective is antibacterial cleaner in preventing the growth of bacteria?” She sets up an experiment in order to study the effectiveness of antibacterial products. Julie hypothesizes that the antibacterial soap will prevent bacterial growth. What would be the best way for Julie to collect data for her experiment?

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.