A firefighter breathes in air normally as he enters a building following an explosion and fire. He has a meter that predicts the PO2 will approximate 15 mm Hg in his tissue fluids as he actively moves about the room. Select the best statement.
a. The large changes in PO2 tissue environments cause only very small changes in hemoglobin O2 saturation, and no oxygen is needed.
b. The firefighter is at about 10% hemoglobin O2 saturation, and he requires an external air tank.
c. The firefighter's hemoglobin saturation will be about one oxygen per hemoglobin, and he will require an external air tank.
d. The S-shaped saturation curve of hemoglobin is flat at this PO2, and O2 saturation doesn't change much with PO2 changes in mm Hg.

Which of the following is a question of morality? a.) delierately reporting false data b.) accidentally reporting false data c.) kepping a sloppy record of experimental observation d.) condition a drug experiment which will harm a lab rats

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

Which strategy is an example of how companies may upgrade themselves to meet changing customer preferences? a.doing door-to-door sellingb.using billboards to advertise the productsc. making online shopping services availabled.giving discounts on products