A coccus
a. is a rod-shaped bacterium.
b. is a spherical bacterium.
c. is a bacterium with an intermediate shape
(between spherical and rod-shaped)
d. is a spiral-shaped bacterium.
e. is a polymorph bacterium
B
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The duplication of a cell's DNA is called ________.
A. replication B. mitosis C. transcription D. mutation E. translation
The fiddlehead is a ________ that unfolds into a ________.
A. diploid sporophyte; fern frond B. haploid gametophyte; fern frond C. diploid gametophyte; fern frond D. diploid gametophyte; moss plant E. haploid sporophyte; fern frond
You extract DNA from human bones in an ancient village buried by volcanic ash. You discover that there is an extremely high frequency of the LCT allele for lactase persistence. What might you conclude about the population?
A. This population is likely the source of the high frequency of the LCT gene in Northern Europe. B. The village could not be more than 4,500 years old. C. The members of this population likely used domesticated livestock for their milk. D. The villagers had a diet rich in wheat or another domesticated crop. E. The population could not have been under strong selection because the gene was not fixed.
The majority of otitis media in children is mainly due to infection with
A. Streptococcus pneumoniae. B. Streptococcus pyogenes. C. Branhamella (Moraxella) catarrhalis. D. Streptococcus agalactiae. E. Staphylococcus saprophyticus.