Schistosoma and Plasmodium species both require
A) direct sexual contact for transmission.
B) immunocompromised hosts.
C) transmission by insect vectors.
D) two hosts to complete their life cycle and reproduce.
Answer: D
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Which of the following is a correct order of arrival in succession?
a. lichens and mosses cottonwood and willow trees Sitka spruce alders b. flowering plants shrubs lichens fir trees c. lichens and mosses alders and hemlock shrubs and grasses Douglas fir d. none of the choices
Which of the following is the primary source of energy for chemoautotrophs?
a. inorganic molecules b. living organisms c. previously living organisms d. sunlight
Three of the four answers listed below are
related by a common location. Select the EXCEPTION.
a. follicle b. corpus luteum c. cervix d. egg
HIV-infected blood may be present on all of the following EXCEPT
a. toothbrushes. b. razors. c. needles used to inject drugs. d. contaminated medical equipment. e. toilet seats.