Branches of a bronchus are known as ____.
A. larynx
B. bronchi
C. bronchioles
D. trachea
E. pharynx
Answer: C
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Oxygen and carbon dioxide both have the ability to bind to hemoglobin, which would seem to be an unfavorable situation for the body, particularly in terms of cellular respiration
What features does the human body use to favor oxygen and not carbon dioxide binding to hemoglobin?
Edward Jenner noticed that the milkmaids who milked cows by hand often were infected with cowpox and that their infections were mild. He also noticed that these same milkmaids did not contract smallpox, which was a much more serious disease. He presumed that the cowpox infections prevented the milkmaids from contracting the much more serious disease of smallpox. Subsequently he began vaccinating people with the pus-like material from cowpox lesions to determine if his thinking was correct. In the story above, the underlined portion is a(n)
A. hypothesis. B. observation. C. theory. D. experiment.
Which of the following techniques utilizes an electric current and the fact that DNA molecules are negatively charged?
Hybridization and gene probes Gel electrophoresis Replication Restriction endonucleases Southern blot
Which organism is killed by atmospheric oxygen?
A. facultative anaerobe B. obligate aerobe C. obligate anaerobe D. aerotolerant anaerobe