From the information presented in the movie, what can you infer about carbon dioxide? A. It is a waste gas that your cells need to get rid of

B. Your cells need a lot of it to function

C. It can only be moved into and out of cells through active transport

D. Its molecules are too large to fit through the pores of cells

Using mr smith and his id, identify two potential internal validity threats that might affect the a—b design. tell me how that threat might impact conclusions in the a—b design. note #1: you cannot use maturation (since i already did that one for note #2: there are some mr smith id threats that won’t have much impact in a single case design.