Option 1: Lance Armstrong lost his seven Tour de France victories in 2012 after being convicted of blood doping. In blood doping, extra red blood cells (which carry oxygen throughout the body) are injected into an athlete. Explain why blood doping would give an athlete an advantage in an endurance event like the Tour de France. Use terms and concepts from this unit. Option 2: A student poured a solution of bromothymol blue into 3 test tubes. She then placed an aquatic plant into 2 of the test tubes. She placed a stopper on each test tube and placed them all in the dark for 24 hours. Bromothymol blue is yellow in a high CO2 environment and turns blue when the CO2 levels decrease. After 24 hours in the dark, the solution in test tubes 2 and 3 had turned yellow. The student then placed test tube 3 in a sunny window, and left test tube 2 in the dark. After 8 hours in the sunny window, what is the final color of the solution in test tube 2

(me out over the last several centuries, scientists have made the following broad observations while investigating several branches of the life sciences: -the fossil record shows that different types of organisms have existed at different times in earth's history. -many organisms have similar body structures that seem to be adapted to different ways of living in their environment. -organisms of different species often share similarities in stages of embryonic development. -many species share genetic similarities, and almost all organisms use the same basic building blocks to construct proteins. -often, the extent of two species' similarities can be predicted from their geographic closeness to each other. -a great deal of change has been observed among species that have experienced strong selective pressures through many generations. scientists have carefully considered and rigorously tested the observations listed above. when scientists offer a of these observations, they are making 1.) testable explanation, deductive explanation 2.) scientific interference, scientific law