Which of the following protists causes a sexually transmitted disease that can result in infertility?
a. Trichomonas vaginalis
b. Trypanosoma cruzi
c. Giardia lamblia
d. Euglena gracilis
a
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Which of the following would be considered an example of bioremediation?
A) adding nitrogen-fixing microorganisms to a degraded ecosystem to increase nitrogen availability B) using a bulldozer to regrade a strip mine C) dredging a river bottom to remove contaminated sediments D) reconfiguring the channel of a river E) adding seeds of a chromium-accumulating plant to soil contaminated by chromium
All of the following are cytokines except
A) interleukins. B) interferons. C) tumor necrosis factor. D) collectins.
Which of the following cells can serve as antigen-presenting cells?
a. macrophages, basophils, and B cells b. dendritic cells, B cells, and T cells c. macrophages, dendritic cells, and B cells d. B cells, T cells, and basophils e. macrophages, T cells, and basophils
All of the following are insects EXCEPT:
a. ticks. b. bugs. c. lice. d. fleas. e. butterflies.