Which of the Following Is Not an Ecological Effect of Viruses

question 193

Multiple Choice

Which of the following is not an ecological effect of viruses?

• A) Huge marine blooms of bacteria, such as of Vibrio, are short-lived because bacteriophage viral blooms soon follow and kill bacteria faster than they can reproduce.
• B) Cholera epidemics caused by a species of Vibrio fade because bacteriophages multiply and control the Vibrio population boom.
• C) Viruses are abundant in both marine and freshwater environments and have a large effect on the ecology of these ecosystems.
• D) One-half of the bacteria in the oceans are killed by viruses every day.
• E) Viruses constitute an important source of nutrition for the many prokaryote species that consume them.

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