A disease that is world-wide like HIV/AIDS is said to be
A. Communicable
B. Epidemic
C. Ubiquitous
D. Endemic
E. Pandemic
Answer: E. Pandemic
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What happens during depolarization?
A. Potassium ions flow out of the cell. B. Sodium ions flow into the cell. C. The sodium/potassium pump protein reverses itself. D. Potassium ions flow out of the cell AND sodium ions flow into the cell.
Which of the following can be determined from the
above figure? a. It uses neutral dyes to stain the bands. b. The chromosomes came from a male. c. The chromosomes came from a female. d. It has too many chromosomes. e. None of these can be determined.
Megaspore mother cells are diploid
Indicate whether the statement is true or false
Answer the following questions true (T) or false (F)
1. Isotype switching of antibodies is beneficial because some pathogens are able to alter their antigens. 2. A patient with a high antibody titer to a pathogen for which there is no vaccination indicates that this person is currently infected with the pathogen or was infected in the past. 3. Artificial immunity is characterized by short-lived protection immune protection because the patient is not making their own memory cells or antibodies.