How has the invention of forensic science helped with crime-solving?
What will be an ideal response?
Using DNA techniques, law enforcement can use much smaller samples from crime
scenes than previously needed for traditional techniques. Forensic analysis provides greater
assurances that the criminal has been identified. Blood typing, for example, merely rules
someone out; it cannot prove that a match is a certainty.
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The ability to determine where a sound is coming from depends primarily on
A. differences in sound intensity in the two ears. B. differences in time of sound arrival to the two ears. C. differences in sound frequency received at the two ears. D. differences in both frequency and intensity at the two ears. E. None of these choices are correct.
Which category of blood vessels will have the largest diameter?
a. Vein b. Arteriole c. Venule d. Capillary e. Artery
The relative impermeability of membranes to watersoluble
molecules is a result of the a. nonpolar nature of water molecules. b. presence of large integral membrane proteins. c. presence of inorganic salt crystals scattered through some membranes. d. presence of cutin and lignin in the membranes. e. presence of phospholipids in the lipid bilayer.
Which one of the following is an example of "gene pharming"?
A) the production of human insulin by E. coli B) the production of beta carotene in golden rice C) the production of goat milk that contains human antithrombin III protein D) the production of HBV vaccines in yeast