Lungless salamanders lack lungs and breathe through their skins after they lose their gills. You would expect lungless salamanders to
A. prefer stagnant water.
B. be restricted to smaller and/or thinner body plans.
C. prefer drier habitats.
D. be larger than most salamanders.
Answer: B
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Moist heat sterilizes by
A. denaturing proteins. B. causing production of singlet oxygen. C. causing the formation of thymine dimers. D. All of the choices are correct.
Organisms are composed of molecules, which are collections of smaller units, termed:
A. monomers. B. atoms. C. electrons. D. polymers. E. ions.
The T2 bacteriophages used in the Hershey and Chase experiment contain ____
a. DNA only b. RNA and protein c. protein, phospholipid, and DNA d. DNA and protein e. protein, phospholipid, DNA, and RNA
A new vaccine for the upcoming flu season is developed from an influenza isolate designated A/Shanghai/2/2013(H7N9). This nomenclature means the isolate is
A) a type A with antigens HA 7 and NA 9 isolated in Shanghai in February 2013. B) a type A with 7 HA antigens and 9 NA antigens isolated in Shanghai in February 2013. C) the second type A strain with HA 7 and NA 9 antigens isolated in Shanghai in 2013. D) a type B strain with antigens HA 7 and NA 9, first isolated in February 2013. E) a hybrid of 2 type As combining 7 HA and 9 NA antigens, created in February 2013.