Why is it probably not a good idea to drink water directly from a mountain stream (i.e., untreated)
even if it appears to be unaffected by human activities?
What will be an ideal response?
It is possible the water contains Giardia. Giardia is a metamonada that induces severe diarrhea and
abdominal cramps and is spread by water contaminated with feces. Therefore, if animals have been
using the stream, there is a chance of it containing Giardia.
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The evolutionary sequence in the development of a complex character can be best analyzed through
A. homoplasies. B. phylogenetics. C. taxonomy. D. classification. E. synapomorphies.
The discovery of ____ allowed researchers to cut chromosomes into manageable-sized DNA fragments
a. single-nucleotide polymorphisms b. restriction enzymes c. DNA assembly enzymes d. fragment length polymorphisms e. receptor proteins
The human immunodeficiency virus may infect
a. sperm cells. b. white blood cells. c. purple blood cells. d. red blood cells. e. egg cells.
A solution that has a higher concentration of dissolved materials than the solution it is compared to is
A. hypertonic. B. hypotonic. C. hydrophobic. D. hydrophilic.