Justify the FBI's use of only 20 short tandem repeats (STRs) as their core set of STRs for forensic analysis
What will be an ideal response?
By characterizing 20 STRs, the analysis covers over two billion combinations even if each STR only exhibits four alleles each. This is highly unlikely as STRs vary in repeats from 7 to 40 times.
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Explain how the adaptations of cartilaginous fishes make them better predators.
What will be an ideal response?
An air temperature rise of 10?C will typically ____ evaporation from leaves
a. completely eliminate b. double the rate of c. mostly eliminate d. triple the rate of e. quadruple the rate of
You have drained a pond on your property to make it deeper. In the process of using a machine to dig, you find that the mud is black and smells terrible. Your prediction is that ________ bacteria predominate in this area of the mud.
A. nitrogen-fixing B. nitrifying C. sulfur-reducing D. sulfur-oxidizing E. denitrifying
A virulence factor common to many members of the Enterobacteriaceae which permits them to deliver harmful proteins directly to cells is
A. fimbriae. B. a glycocalyx. C. type III secretion system. D. pili. E. porins.