The third line of defense against foreign invaders can be described as having ________ and ________.
A. diversity; barriers
B. complexity, versatility
C. surveillance; complexity
D. specificity; memory
Answer: D
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Your instructor has assigned you the task of identifying an unknown fungus. When you examine the cellular structure under the microscope, you note that the cells are flagellated. To which group does the unknown fungus belong?
A. chytrids B. choanflagellates C. yeasts D. conidia E. bread molds
The genetic relatedness of two siblings is
A) 2.0. B) 1.0. C) 0.5. D) 0.25. E) 0.75.
Conservationists have identified 25 areas worldwide as hotspots. This means these areas
A. have the highest numbers of invasive species worldwide. B. have serious pollution problems and are being targeted for cleanup. C. are currently being preserved. D. have high numbers of endemic species, and those numbers are increasing. E. have high numbers of endemic species, and those numbers are decreasing.
Which of the following best describes IgM antibodies?
A. They cause basophils and eosinophils to degranulate. B. They are the most common type of antibody in the blood during the initial stages of an immune response. C. They are the antibody class found in body secretions. D. They interact with phagocytes and NK cells. E. They can cross the placenta to provide passive immunity.