The progenitor cell that is closest to the anchor cell:
A. receives the largest dose of EGF.
B. activates genes for differentiation into a
Type 1 cell.
C. prevents the adjacent cells from
differentiating into a Type 1 cell.
D. induces the adjacent cells to differentiate
into Type 2 cells.
E. All of these choices are correct.
E
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The major physical symptom associated with Klinefelter syndrome is ____
a. facial deformation b. fertility problems c. short stature d. intellectual disability e. heart abnormalities
Which of the following statements belongs in the Introduction of a scientific paper?
A. Intruder crickets were marked on the thorax with a paint pen in order to distinguish them from the resident crickets. B. It is predicted that males that have been residents in an artificial territory for several days will win pairwise contests more often than will intruders. C. The null hypothesis for the statistical test was that wins would be no more likely for residents than they would be for intruders (50:50). D. A p-value of 0.05 or less for the statistical test was considered sufficient evidence to reject the null hypothesis.
Sulfanilamide is an antimicrobial drug that mimics the shape of an important substrate for a particular bacterial enzyme, thereby inhibiting the enzyme. This type of inhibition is known as
A) allosteric inhibition. B) competitive inhibition. C) allosteric activation. D) noncompetitive inhibition. E) feedback inhibition.
Which of the following is not correct concerning the plague?
A. Mice, voles and other rodents are primary long-term reservoirs. B. Strains of the plague bacillus are less virulent today as in the Middle Ages C. It is transmitted by flea vectors. D. Less than 10 cases per year occur in the US. E. The etiological agent is Yersinia pestis