Which mechanism of genetic transfer utilizes a sex pilus?
A. Transformation
B. Transduction
C. Conjugation
D. All of the answers are correct
C
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The bony or cartilaginous cranium in chordates is adaptive because it
A. develops into the postanal tail. B. protects the brain. C. allows movement, as a lightweight exoskeleton structure. D. replaces the notochord in most chordates. E. forms the vertebrae.
Repressor proteins do not __________________.
A. prevent binding of RNA polymerase to DNA B. cause the DNA regions that contain the operator to twist or loop C. inactivate operon genes when their products are not required D. bind to sets of operators E. increase transcription rates
Microbial growth in jellies is inhibited by the (acidic/hypotonic/hypertonic) condition of the food
What will be an ideal response?
What kind of population spacing would you expect for a species that is strongly territorial?
A. Uniform B. Uniform or clumped depending on the life history strategy of the species C. Clumped D. Random E. Uniform or clumped depending on whether it is a source or sink metapopulation