Chemical methods to extract some usable energy from glucose molecules without using oxygen are possible and used by many organisms. However, cellular respiration reactions using oxygen are more common because using oxidative respiration
A) yields much more energy than anaerobic respiration.
B) generates the water needed by most organisms to survive.
C) provides carbon dioxide that is essential for photosynthesis.
D) allows glucose to be stored instead of burned.
Question 2
From the 1930s to the 1950s, an X-ray machine called a shoe-fitting fluoroscope was common in shoe stores.
People would try on shoes, stand with their feet in the machine, and allow the salesperson to view live images of the bones of their feet in the shoes Sometimes the salesperson would reach down and adjust the person's shoes for a better image. These machines used X-rays and exposed the feet of customers to 5 to 30 seconds of radiation. Further, lower doses of radiation exposure also occurred within about 10 to 15 inches of the outside of the machine. If you were looking for medical problems resulting from the use of these fluoroscopes in shoe stores, where would you expect the greatest harm? A) customers who had their feet exposed to the X-ray device
B) the salespeople who operated the machine to sell shoes
C) salespeople who worked in nearby stores
D) the salesperson who worked behind the cash register in the store
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