The tropical diseases such as African sleeping sickness, Chaga's disease, and leishmaniasis are caused by

A. oomycetes.
B. trypanosomes.
C. sporozoans.
D. phytomastigotes.
E. foraminifera.


Answer: B

Biology & Microbiology

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Osmosis is the diffusion of water across a membrane in response to the concentration of one or more of the ______. 

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The olfactory receptors discovered by Richard Axel and Linda Buck are members of a large family of similar receptor molecules termed

A. G-protein coupled receptors. B. ligand-gated ion channels. C. voltage-gated ion channels. D. intracellular receptors. E. serine/threonine proteases.

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________ places sperm into a woman's reproductive tract to fertilize an oocyte.

A) Sperm washing B) Intrauterine insemination C) GIFT D) IVF

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Microbial decomposition of organic matter results in NH4+ production through a process called ________

Fill in the blank(s) with correct word

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