The insect symbiont Wolbachia can be used to suppress disease transmission by mosquitoes because
A) Wolbachia supplies essential nutrients to the mosquito Culex quinquefasciatus.
B) only Wolbachia-infected mosquitoes can transmit viral diseases such as dengue fever.
C) Wolbachia infections can spread rapidly through a mosquito population, killing all the mosquitoes.
D) Wolbachia-infected male mosquitoes sterilize uninfected female mosquitoes.
Answer: A
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Which of the following is most likely to occur when a tumor-suppressor gene is mutated?
A. The tumor-suppressor gene may be overactive. B. The resulting tumor-suppressor protein would further suppress cell proliferation. C. The resulting tumor-suppressor protein would activate an oncogene. D. The tumor-suppressor gene and resulting protein may lose its function and ability to suppress cell proliferation. E. None of the choices are possible.
The genital tract infection characterized by an unpleasant odor and an increase in clue cells is
A. trichomoniasis. B. candidiasis. C. amoebiasis. D. bacterial vaginosis
What of the following is not associated with an El Nino event? a. Decline in marine primary producers
b. Decrease in the nutrients along the eastern Pacific coasts. c. Warm currents replace cold currents. d. Decline in the anchovy population. e. Increase in sea lion populations.
Plasmolysis is the cellular loss of water. How can a cell potentially prevent this?
(a) Decreasing proton concentrations (b) Closing down the cell wall (c) Increasing the cytoplasmic solute concentration (d) Increasing the apoplastic solute concentration