The disease cholera results from infection of the epithelial cells of the gut by the phage Vibrio cholerae. The phage-infected cells produce new proteins, cholera toxin A and cholera toxin B, that are secreted into the gut. Cholera toxin B assembles into multisubunit complexes in the membranes of gut eptitheial cells and permits the toxic cholera toxin A to enter these cells, causing an ion imbalance and massive, watery diarrhea which permits the phage to spread to a new host. The structural assembly of cholera toxin B into multisubunit complexes is an example of: a. primary structure
b. secondary structure
c. tertiary stucture
d. quaternary structure
e. All of the Above

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

Which statement best describes a typical difference that could be found between the "analysis" and "conclusion" sections of a lab report? a) only the "conclusion" describes errors that occurred during the experiment, and only the "analysis" section suggests further research. b) only the "analysis" section includes specific data comparisons, and only the "conclusion" section suggests further research. c) only the "analysis" section discusses whether the original hypothesis was supported, and both sections include graphs of data. d) only the "conclusion section discusses whether the original hypothesis was supported, and both sections suggest further research.(the answer is b i just took the test)