Genes from different organisms with similar sequences or open reading frames (ORFs) are called ________.
Fill in the blank(s) with the appropriate word(s).
orthologues
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Frameshift mutations may involve
a. substitution of nucleotides. b. substitution of codons. c. substitution of amino acids. d. addition or deletion of one or more base pairs. e. none of these
The type of cells that are particularly effective at attacking body cells infected by viruses are
A. macrophages. B. natural killer cells. C. monocytes. D. eosinophils.
The sun shining on a tidal pool during a hot day heats the water. As some water evaporates, the pool becomes saltier, causing _____
A) an increase in its carbon dioxide content B) a decrease in its oxygen content C) an increase in its ability to sustain aerobic organisms D) a decrease in the water's density
The chief diagnostic sign of brucellosis is
A) petechiae. B) jaundice. C) "bull's eye" rash. D) fever which recurs at 24 hour intervals. E) fever which cycles every 72 hours.