A young woman is brought to the ER who is running a high fever and is confused about where she is. She also has an extensive red rash. She begins vomiting, and her blood pressure drops. The ER staff determine she is menstruating. What is the likely
diagnosis?
What will be an ideal response?
The red rash and fever are consistent with staphylococcal toxic shock syndrome. This disease most commonly occurs in menstruating women whose tampons are left in place too long. The signs and symptoms are largely due to the action of toxic shock syndrome toxin (TSST), an exotoxin that enters the bloodstream to cause systemic symptoms.
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Claytonia virginica is a woodland spring herb with flowers that vary from white to pale pink to bright pink. Slugs prefer to eat pink-flowering over white-flowering plants (due to chemical differences between the two), and plants experiencing severe
herbivory are more likely to die. The bees that pollinate this plant also prefer pink to white flowers, so that Claytonia with pink flowers have greater relative fruit set than Claytonia with white flowers. A researcher observes that the percentage of different flower colors remains stable in the study population from year to year. Given no other information, if the researcher removes all slugs from the study population, what do you expect to happen to the distribution of flower colors in the population over time? A) The percentage of pink flowers should increase over time. B) The percentage of white flowers should increase over time. C) The distribution of flower colors should not change. D) The distribution of flower colors should randomly fluctuate over time.
The smooth endoplasmic reticulum functions in synthesis of
A) lipids. B) polysaccharides. C) proteins. D) DNA. E) lipids, polysaccharides, proteins, and DNA.
A ________ is a piece of extrachromosomal DNA that has its own replication origin.
Fill in the blank(s) with the appropriate word(s).
One day after a biology class four of your friends argue about the difference between phylogeny and systematics. Which friend is right?
A. Friend A states that systematics and phylogenies are really the same, one is more recent than the other, but basically they are the same. B. Friend B says that systematics is the same as cladistics and cladistics is reconstructing clades, which ultimately lead to the development of phylogenies. C. Friend C argues that systematics is the actual collecting and cataloguing of specimens into museums that can be used later by scientists to construct clades and phylogenies. D. Friend D says that the way she remembers is that systematics is the reconstruction and study of phylogenies.