To create a DNA profile from scarce quantities of DNA, such as a fossil or a single hair, the ____________________ technique is necessary to obtain enough DNA for analysis
Fill in the blank(s) with correct word
PCR
polymerase chain reaction
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The chief source of central nervous system (CNS) infections is through the
A. bloodstream. B. genitourinary system. C. skin. D. nerves.
Eyes are
a. chemoreceptors. b. mechanoreceptors. c. photoreceptors. d. nociceptors. e. none of these.
Which statement is true about nitrate(NO3-)?
(a) Nitrate is exclusively accessible for plants by interacting with fungi (b) Nitrate uptake in plants is an energy dependent process that is facilitated through a proton gradient (c) Nitrate is first fixed by mycorrhiza before rhizobia make use of it inside the root of a legume (d) Nitrate is a gaseous form of nitrogen, and cannot be used directly by a plant
A student conducted an original, well designed experiment, carefully following proper scientific procedure.. In order for the conclusion to become generally accepted, the experiment must
a. contain several experimental variables b. support the original hypothesis c. be repeated to verify the reliability of the data d. be conducted by a scientist