a coach thinks a special sports drink will make his players stronger. he creates two groups of 20 players and gives each group the same task (each group are to lift 300 pounds). group A is given the special drink, but group B is not given the special drink. After an hour, the coach counts how many players were able to lift 300 pounds. in group A, 15 players were able to lift the 300 pounds, but only 5 players in group B were able to lift the 300 pounds. identify the: A. independent variable B. dependent variable C. control group

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.