what is the term for an aggregated assembly of bacteria and organic material within a host that commonly forms on catheters, prosthetic devices and on teeth
What will be an ideal response?
biofilm
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How is a DNA fragment containing a gene of interest generated for cloning?
a. The gene with a cloning vector is ligated. b. Agarose gel electrophoresis takes place c. The polymerase chain reaction (PCR) amplifies the DNA fragment from the genome d. A DNA polymerase specific for the fragment is used to make copies e. DNA fingerprinting allows the fragment to be copied from the chromosome.
A series of speciation events in ancestors of wheat led to modern wheat, which arose through ________
a. stasis b. allopolyploidy c. autopolyploidy d. parapatric speciation
A red blood cell will burst when placed in which of
the following kinds of solution? a. hypotonic b. hypertonic c. isotonic d. any of these e. none of these
How does CO2 enter a plant?
A) Through the roots B) Through the stomata C) Through the stroma D) Through the grana