In PCR, heating of the DNA is necessary because:
A) it causes the primers to bind DNA.
B) it separates the two strands of DNA.
C) DNA polymerases require high heat to work.
D) it cuts the DNA into fragments small enough to be replicated.
Answer: B
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E. coli 0157:H7
A. is Gram-positive. B. is a normal constituent of the intestinal tract. C. does not ferment sorbitol. D. produces a toxin. E. does not ferment sorbitol AND produces a toxin.
Describe the positioning of heartwood versus sapwood
What will be an ideal response?
Artificial selection and hybridization can demonstrate the ________ basis of behavior.
A. operant B. endogenous C. cognitive D. genetic E. associational
Choose the letter of the best match from the following:A. protodermB. vascular cambiumC. apical meristemD. procambiumE. ground meristemLateral meristem that contributes to the increase in thickness of a stem or root.
Fill in the blank(s) with the appropriate word(s).