Apicomplexan organisms such as Plasmodium possess a motile, infective stage called the ________.
A. trophozoite
B. apizoite
C. sporozoite
D. None of the choices are correct.
Answer: C
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Which one of the following divisions of the nervous system predominates during the relaxed state?
A) sensory division B) sympathetic division C) somatic division D) parasympathetic division E) endocrine division
Why is adult anatomy sometimes a misleading way to construct a phylogeny that reflects evolutionary history?
A) Adult anatomy isn't strongly influenced by natural selection. B) Convergent evolution produces similar traits in unrelated species. C) Adult anatomy is too variable within a species.
Jams, jellies, preserves, honey, and other foods with high sugar content hardly ever become contaminated by bacteria, even when the food containers are left open at room temperature. This is because bacteria that encounter such an environment ____
A) undergo death as a result of water loss from the cell B) are unable to metabolize the glucose or fructose, and thus starve to death C) are obligate anaerobes D) are unable to swim through these thick and viscous materials
Lysol works by disrupting bacterial proteins and the lipid membrane, it has a broad spectrum of action. Triclosan is a disinfectant that works by acting on a single specific protein that bacteria require to make an effective lipid membrane. Triclosan has a specific target and does not have a broad spectrum of action. Is a microorganism more likely to develop resistance to a disinfectant that has a broad spectrum of action such as lysol, or a disinfectant that has a specific target in a bacterial cell such as Triclosan?
A) A disinfectant that has a broad spectrum of action. B) A disinfectant that has a specific target in a bacterial cell.