A 30-year-old woman who is not pregnant presents with a foul-smelling, greenish vaginal discharge, indicating some form of vaginitis. A smear is taken, and routine tests performed. A motile, unicellular eukaryote with multiple flagella and an undulating
membrane is observed in the microscope. What treatment is recommended?
A) topical antifungal cream
B) clindamycin
C) combination therapy of ceftriaxone and azithromycin
D) doxycycline
E) single dose of metronidazole
Answer: E
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Cnidarians (such as jellyfish) and flatworms have _____ digestive tract, ______
a. a complete; processing food from mouth to anus b. a blind ended; expelling undigested wastes through the single opening c. a blind ended; completely digesting anything entering it d. no; absorbing nutrients by phagocytosis e. no; capturing food by filter feeding
Select the anaerobic pathway
a. aerobic respiration b. citric acid cycle c. electron transport chain d. fermentation e. chemiosmosis
In Morgan's testcross of a gray-bodied, long-winged heterozygous female Drosophila with a homozygous recessive black-bodied, vestigial-winged male, the following offspring were obtained: 965 gray body, long wing; 944 black body, vestigial wing; 206 gray body, vestigial wing; 185 black body, long wing. Focusing only on the recombinant classes (gray body, vestigial wing and black body, long wing), the numbers of offspring of each type are similar (206 and 185). What accounts for the similar number of offspring of each recombinant phenotype?
Cytokinesis typically begins during the ________ stage of mitosis
A) telophase B) prophase C) metaphase D) anaphase