In medical studies where a new drug is tested, The control group would be asked to take a pill (or treatment) that looks/tastes just like the real thing, but would not be told whether they have the
actual drug or not. The experimental group would receive the real drug. What type of study is it where the test subjects do not know their assigned group.

Random Study
Blind Study
Biased Study
Controlled Study

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.