Non-native species that are introduced to new environments, spread far beyond the original point of introduction, and cause damage are called
A) predators.
B) pathogens.
C) invasive species.
D) herbivores.
Answer: C
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Which of the following is the correct flow of air being inhaled?
a) nasopharynx, oropharynx, laryngopharynx, larynx b) nasopharynx, nasal vestibule, nasal cavity, oropharynx c) nasal vestibule, nasal cavity, nasopharynx, laryngopharynx, oropharynx d) larynx, laryngopharynx, nasopharynx, oropharynxa
Traditionally, an unknown bacterium is classified
based on all the following EXCEPT a. observable characteristics. b. shape. c. cell wall structure. d. metabolism. e. sexual partners.
Which of the following statements regarding poliomyelitis is incorrect?
A. The virus is transmitted by contaminated water. B. Summer outbreaks in the U.S. have been increasing in frequency. C. If the virus enters the central nervous system, motor neurons can be infected and destroyed. D. It can be asymptomatic or mild with headache, sore throat, fever, and nausea. E. It is caused by poliovirus (genus Enterovirus).
The basic function of activated T cells is to battle
A) pathogens in blood or lymph. B) pathogens in interstitial fluid. C) pathogens that have already entered body cells. D) chemical mediators of immunity.