Respiratory syncytial virus
A. uses the nasopharynx as its main replication site.
B. has symptoms of dyspnea and rales.
C. can be treated with the antiviral aerosol ribavirin.
D. causes serious disease in infants 6 months old or younger.
E. All of the choices are correct.
Answer: E
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Nematodes are unusual among worms of other major phyla by:
A. having longitudinal muscles but no circular muscles B. having separate male and female individuals C. by shedding their integument D. by having a tough cuticle made largely of collagen E. All of the choices provided are correct
Which of the following is a protective layer of cell envelope?
A. Pilus B. Glycocalyx C. Ribosome D. Fimbria E. Nucleoid
Which of the following statements is false?
a. The systemic circuit initially carries oxygenated blood. b. Humans have an open circulatory system. c. The function of the heart is to generate pressure to make blood flow through the circulatory system. d. The rate of blood flow varies throughout the circulatory system. e. Excess interstitial fluid is returned to the circulatory system in the lymphatic system.
Who was the first to visualize and study microbes using a simple lens microscope?
A. Hippocrates B. Robert Hooke C. Van Leeuwenhock D. Girolamo Fracastoro E. Robert Koch