Which feature or structure of Bacillus anthracis enables it to evade death by macrophages and grow inside macrophages?
a. capsule
b. endospore
c. pilus
d. siderophore
Answer: A
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Most mammals excrete _____; most aquatic animals excrete _____; birds, insects, and many reptiles excrete _____
A. uric acid; urea; ammonia B. uric acid; ammonia; urea C. urea; uric acid; ammonia D. urea; ammonia; uric acid E. ammonia; urea; uric acid
Which one of the following terms applies to the phylum Arthropoda?
A. radial symmetry B. diploblastic C. coelomate D. Parazoa E. deuterostome
Jenner's successful use of cowpox virus as a vaccine against the smallpox virus was due to the fact that _____
A) the immune system responds nonspecifically to antigens B) the cowpox virus made antibodies in response to the presence of smallpox C) there are some epitopes (antigenic determinants) common to both pox viruses D) cowpox and smallpox are caused by the same virus
The repeated use of which drug leads to the body decreasing the natural production of endorphins?
A. methamphetamine B. heroin C. ecstasy D. marijuana E. K2