Which functional group is characteristic of organic acids such as acetic acid?
a. carbonyl group
b. hydroxyl group
c. phosphate group
d. amino group
e. carboxyl group
E
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Tularemia, characterized by glandular, ulceroglandular, oculoglandular, oropharyngeal, systemic, and pneumonic presentations, is caused by which of the following species?
a. Brucella b. Bordetella c. Pasteurella d. Francisella
In most eudicots, a short stalk called a ____ attaches the leaf to a stem
a. vascular bundle b. petiole c. node d. bundle sheath e. stomata
During which phase of meiosis will the chromosomes appear as packets of four chromatids?
a. anaphase I b. telophase II c. anaphase II d. prophase I e. metaphase II
The leukocytes called natural killer lymphocytes
A. release prostaglandins and leukotrienes in response to microbes. B. increase in allergies and helminth infection. C. respond to the coating of a pathogen by complement. D. are nonspecific leukocytes that secrete toxins onto the surface of virus-infected cells. E. are specialists in killing bacteria.