How are fleas transmitted between hosts?
A) via direct transmission
B) via an intermediate vector
C) through multiple hosts
D) via water
A
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Structures that have similar structure and function but different evolutionary origins are called:
A. inherited. B. evolutionary modifications. C. analogous. D. homologous. E. uniform.
A soldier ant dies defending the ant colony from invading termites. Which of the following terms best
describes this event? a. suprachiasmatic protection b. sociobiology c. ultimate cause d. inclusive fitness e. altruism
You briefly expose bacteria undergoing DNA replication to radioactively labeled nucleotides. When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes
One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). These two classes of DNA probably represent _____. A) leading strands and Okazaki fragments B) lagging strands and Okazaki fragments C) Okazaki fragments and RNA primers D) leading strands and RNA primers
The plasma membrane functions as a
a. selective barrier to the passage of molecules. b. site for the uptake of macromolecules into the cell. c. site for cell-cell interactions. d. All of the above