Helicobacter pylori produces (cytotoxin/hyaluronidase/urease), a unique virulence factor important to colonizing the digestive system.
Fill in the blank(s) with the appropriate word(s).
urease
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Morbidity statistics more precisely define the health of a population than mortality statistics
Indicate whether the statement is true or false.
Which vertebrates rely on a positive pressure filling mechanism to move air into their lungs?
A. human B. crocodile C. eagle D. mouse E. bullfrog
Which of the following statements concerning reduction reactions is FALSE?
A) An electron acceptor gains an electron. B) They are coupled with oxidation reactions. C) They frequently involve electron carrier molecules. D) An electron acceptor becomes more positively charged. E) A molecule gains a hydrogen atom.
Paramecia use cilia for locomotion and for gathering organic matter. How are rotifers similar?
A. Rotifers and ciliates are thought to have given rise to all other animal phyla. B. The corona is made of cilia, and used for swimming and feeding. C. Rotifers are single-celled protists. D. Both lack a gut.