Which species of bacteria is responsible for causing diseases such as rheumatic fever, glomeru-lonephritis, and exudative pharyngitis?
a. Streptococcus agalactiae
b. S. pyogenes
c. S. pneumoniae
d. Enterococcus
B
S. pyogenes causes all of these diseases.
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The site or natural environmental location in which the causative organism is normally found is called the ________.
A. carrier B. animate phase C. reservoir D. source
The three stress hormones are _____
a. cortisol, FSH, and LH b. epinephrine, cortisol, and FSH c. norepinephrine, cortisol, and FSH d. epinephrine, norepinephrine, and cortisol e. epinephrine, norepinephrine, and FSH
A student uses restriction enzymes to cut a DNA molecule into fragments. The digested DNA is loaded into the wells of an agarose gel and the gel is subjected to an electric current. Upon completion of the run, the gel is stained. The rate of migration of the DNA fragments through the agarose gel is determined by the
(A) ratio of adenine to cytosine in the fragment (B) presence of hydrogen bonds between base pairs (C) length of time the electrophoresis unit is allowed to operate (D) number of nucleotides in the fragment (E) volume of the starting sample
Which of the following are miss-matched with their school of systematics?
A. cladistic systematics --shared derived characters B. phenetic sytematics -- number of similarities C. traditional systematics -- anatomy D. Parsimony -- minimum number of similar characters