Match the definition with the term it is describing.
Transformation
A) Taking up plasmid DNA from the environment
B) Plasmid containing genes from different organisms
C) Cell capable of transformation
A) Taking up plasmid DNA from the environment
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When researchers analyzed the remains of Tsar Nicholas II of Russia and his family, they found that the suspected Tsar and his living great-grandniece Xenia differed at nucleotide position 16169 in the mitochondrial DNA. Retesting the remains showed that for this site in the mitochondrial genome, the purported Tsar had thymine (T) in some samples and cytosine (C) in others. The most likely cause of this finding is
A) the samples were too old. B) incomplete dominance. C) pleiotropy. D) heteroplasmy.
Eukaryotic cells contain
A. a nucleus. B. cell membranes. C. organelles. D. All of these answers are true.
In which environmental conditions can you find microorganisms?
A) low oxygen B) high temperature C) high salt content D) high pressure E) all of these
Enterobius vermicularis is
A. often fatal in heavy infestations. B. a whipworm. C. common only to the tropics and subtropics. D. an intestinal worm that easily contaminates fingers and fomites. E. All of the choices are correct.