A patient has amebic colitis. A microscopic examination reveals the following: • 18 µm in diameter • Fine granules • Centrally located karyosome • Cytoplasm with a "ground-glass" appearance • RBC inclusions This protozoan can be identified as:
a. Entamoeba dispar.
b. E. histolytica.
c. Entamoeba hartmanni.
d. E. coli.
B
These characteristics are all associated with E. histolytica infections.
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Which plant's seeds are "naked", or not within a fruit?
a. angiosperms b. gymnosperms c. bryophytes d. endosperms e. lycophytes
What were the long-term responses of each population following the removal of the mice? a. At about year 40, the deer mice population began to re-establish, but then crashed quicklyafter that
b. At about year 40, the deer mice population began to re-establish, and quickly grew back to itsoriginal population size. c. There was no apparent impact on any other population size. d. Both b and c above.
The solvent, cohesive, and temperature stabilization properties of water are primarily due to its ____
a. ability to promote hydrophilic interactions b. ionic bonds c. hydrogen bonds d. ability to promote hydrophobic interactions e. nonpolar nature
In humans, the transparent sac that contains fluid that cushions the embryo and maintains a constant temperature and pressure is the
A. amnion. B. yolk sac. C. embryonic disc. D. chorionic villus. E. chorion.