Which of the following Campylobacter spp. may cause a sexual-transmitted-like disease in cattle?
A. Campylobacter rectus
B. Campylobacter coli
C. Campylobacter fetus subsp. venerealis
D. Campylobacter jejuni
E. Campylobacter fetus subsp. fetus
Ans: C. Campylobacter fetus subsp. venerealis
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Plate tectonic theory is based on
a. a thermal convection model in which cool material in the earth's mantle rises and spreads laterally beneath the crustal plates. b. the idea that the earth's crust is fragmented into rigid crusts that are sinking slowly beneath crustal plates. c. the idea that coacervate formation causes continents to drift apart slowly on their crustal plates. d. observations that the sea floor is slowly spreading away from oceanic ridges due to thermal convection in the mantle. e. all of these.
During which stage of mitosis do replicated chromosomes condense and the nuclear envelope disappear?
A. telophase B. metaphase C. anaphase D. interphase E. prophase
A three-chambered heart
A) has one atrium and two ventricles. B) has three ventricles. C) has two atria and one ventricle. D) is found in fish. E) has three atria.
Which endocrine gland is the main center for control of the internal environment?
A. Pineal B. Hypothalamus C. Thyroid D. Adrenal cortex E. Thalamus