See how to use a CO 2 and O 2 Gas Sensor to measure the concentrations of gas during cell respiration of peas. This lab is suitable for AP biology as well as general biology.he. Gas Sensor measures gaseous carbon dioxide in two rangesâ 0 to 10,000 ppm and 0 to 100,000 ppm.
usage: The extended sense of decimate, âto destroy a great number or proportion of,â developed in the 19th century. Because the etymological sense of one-tenth remains to some extent, decimate is not ordinarily used with figures: Drought has destroyed (not decimated) 80 percent of the herd.
The earliest English sense of decimate is âto select by lot and execute every tenth soldier of (a unit).â The extended sense âdestroy a great number or proportion ofâ developed in the 19th century: Cholera decimated the urban population.