The sexually transmitted infection trichomoniasis is identified by the presence of the motile ________ protists in a wet mount of fluid discharged from the patient
a. Trichomonas gallinae
b. Trichomonas tenax
c. Trichomonas termopsidis
d. Trichomonas vaginalis
Answer: D
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Parenting behavior is rare once the eggs have
hatched or birth has occurred in a. birds. b. amphibians. c. mammals. d. reptiles. e. amphibians and reptiles.
When a neuron undergoes a change in membrane potential that is proportional to (i.e., varies depending on) the strength of the stimulus given to that neuron, this is referred to as a(n)
A. graded potential. B. action potential. C. reversal potential. D. resting potential. E. equilibrium potential.
The term peptidyl transferase relates to ________
A) elongation factors binding to the large ribosomal subunit B) 5' capping of mRNA C) discontinuous strand replication D) base additions during mRNA synthesis E) peptide bond formation during protein synthesis
One of the first steps in obtaining a karyotype (such as that shown below of a cancer cell) is treating cells with a drug that stalls cells in mitosis. Why must cells arrest in mitosis for karyotype analysis?
A. Only mitotic chromosome DNA is separated into single strands, allowing for staining by dyes. B. Only in mitosis are homologous chromosomes paired up. C. Only mitotic chromosomes are highly condensed and visible with a light microscope. D. Only mitotic cells contain homologous chromosomes, because mitosis happens after DNA replication.