Which of the following is likely the oldest known lineage in the Archaea?
a. Crenarchaeota
b. Nanoarchaeota
c. Korarchaeota
d. Euryarchaeota
Ans: c. Korarchaeota
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Pasteurization is an example of what kind of technique?
A) antiseptic B) disinfection C) sterilization D) surgical aseptic
Tetrapod digits are known to be
a. an entirely novel evolutionary structure d. controlled by genes present in the common ancestor of primates b. controlled by the Pitx1 gene e. the result of a mutation in a Hox gene c. controlled by genes that were present in the common ancestor of sharks
During prophase I, each chiasma represents:a
the remnants of the nuclear membrane. b. the remnant of the nucleolus. c. a newly formed haploid gamete. d. a site of crossing-over. e. the site where sister chromatids are connected
A DNA (library/microarray/screen) may be used to study the complex, changing patterns of mRNA production in an organism.
Fill in the blank(s) with the appropriate word(s).