Which of the following intestinal protozoa has no cyst stage, ranges from 9 to 12 µm in diameter, and has two nuclei in 60% of clinical specimens?
a. Giardia duodenalis
b. Chilomastix mesnili
c. Dientamoeba fragilis
d. Enteromonas hominis
C
D. fragilis has no cyst stage and ranges from 9 to 12 µm. Two nuclei are observed in 60% of clinical specimens.
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When a cell uses substantial energy to organize its cell contents to a greater degree than the organization that exists outside the living cell
A) energy has been created. B) entropy has increased. C) entropy has decreased. D) entropy remains the same. E) energy has been destroyed.
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In general, communities in early succession will be dominated by fast-growing species with r-selected life histories.
Answer the following statement true (T) or false (F)