Which organism is associated with commonly causing urinary tract infections in sexually active young adult and adolescent females?
A. Staphylococcus aureus
B. Staphylococcus epidermidis
C. Staphylococcus saprophyticus
D. Streptococcus pyogenes
E. Streptococcus agalactiae
Answer: C. Staphylococcus saprophyticus
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Choose the true statements about the cichlid fish of Lake Malawi.
_____ Within a few million years, hundreds of cichlid species evolved within this lake. _____ Hundreds of different genes determine the length of the jaw in these fish. _____ Jaw length does not affect body shape and size. _____ Variation in jaw structure among species allowed cichlids to specialize in many niches.
An example from the text contrasts two forests, each with 10 species and a total of 50 trees. In the first forest, 39 of
the 50 trees represent the dominant species. The second forest has 5 of each of the 10 different species. What conclusion can be drawn regarding these two forests?
a. The amount of animal species in each forest would be the same. b. The first forest is more diverse than the second. c. The first forest must have had some human interference. d. The second forest is more diverse than the first. e. The second forest must have had some human interference.
Now that small molecular-level deletions and subtle chromosomal rearrangements can be discovered using advanced cytogenetic techniques and microarrays, disorders whose causes had not previously been known can have their basis identified
However, since most of these are not widely publicized, being individually rare, it has been difficult to identify patients with shared chromosomal abnormalities who share phenotypic features. A new database, known as DECIPHER, is now available to search for patients with like phenotypes and/or like chromosomal abnormalities. If you are the clinical geneticist who has a patient whose data is entered into this database, suggest three or more ways using this database can benefit your patient or your field in general.
Which of the following is NOT an important characteristic of either Neisseria gonorrhoeae or Neisseria meningitidis?
A. M protein B. Pili C. Polysaccharide capsule D. IgA protease