Ryan Robinson, a student at West Jessamine High School, died due to evolution that had occurred in ___________.
Fill in the blank(s) with the appropriate word(s).
Answer: A staph bacteria
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People with very light skin have ________.
A) more melanocytes than people with very dark skin. B) fewer melanocytes than people with very dark skin. C) about the same number of melanocytes as people with very dark skin. D) red melanocytes.
Mean platelet volume (MPV) in humans increases with heart attacks and strokes and is used to predict recurrence as well as mortality. MPV has high heritability
A recent GWA study found MPV to be associated with SNPs on chromosomes 12, 3, and 17, respectively. These three QTLs accounted for 4-5% of MPV variance. Which of the following is a reasonable explanation? A) Other loci may also account for significant variance of MPV. B) These SNPs must be translocated or transposed alleles. C) Monitoring of these SNPs should identify those at highest risk. D) The three SNPs, when sequenced, should show high conservation. E) The three SNPs will be found in genes responsible for stroke.
Salt is often used to melt ice on roads during the winter because it lowers the freezing/melting point of water. When salt dissolves in water, individual Na+ and Cl- ions break away from the salt lattice and become surrounded by water molecules. Why would this cause ice to melt?
A. Hydrogen bonds are formed, and the salt ions bond with O. As a result, it is more difficult for water molecules to bond and form ice. B. Hydrogen bonds are broken, and the salt ions interfere with interactions between H and O. As a result, it is more difficult for water molecules to bond and form ice. C. Hydrogen bonds are broken, and the salt ions bond with O and H respectively. As a result, it is more difficult for water molecules to bond and form ice.
Which of the following is not one of the major transmembrane proteins in tight junctions?
a. Claudin b. JAM (junctional adhesion molecule) c. Occludin d. Thrombospondin