The signs and symptoms of infection with Helicobacter pylori are the result of
A) damage to the lining of blood vessels by H. pylori.
B) invasion by H. pylori into the mucosa of the large intestine.
C) invasion by H. pylori into the mucosa of the stomach.
D) the production of exotoxins by H. pylori in the intestines.
E) the production of toxins by H. pylori in contaminated food.
C
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The use of microorganisms or their products to alleviate plant disease is called biological control
Indicate whether the statement is true or false
A sense of hearing can be found in
A. vertebrates. B. molluscs. C. cnidarians. D. arthropods. E. vertebrates and arthropods.
Meiosis in flowering plants gives rise to cells that are
a. haploid gametophytes. b. diploid sporophytes. c. sporophytes that can be haploid or diploid. d. diploid gametophytes. e. haploid sporophytes.
Which of the following brain structures would cause central diabetes insipidus if it were damaged?
A) cerebrum B) pons C) cerebellum D) hypothalamus