4) from "Carbon Dioxide and Photosynthesis"
What is the independent variable in this experiment?
A) type of plant
B) number of trials
C) amount of carbon dioxide
D) number of oxygen bubbles
3

Draw the farm's ppf for corn and beef. draw a point that shows an inefficient combination of corn and beef. label ita. draw a point that shows an unattainable combination of corn and beef. label itb. draw a point that shows an efficient combination of corn and beef. label itc.