Question

viruses. which of the following statements would be the best hypothesis for the flu - d12 virus investigation? if the flu - d12 virus is exposed to saliva at room temperature, then the virus will be killed, preventing human infection. if the flu - d12 virus is exposed to ultraviolet light, then it will prevent humans from catching it. if the flu - d12 virus is in a low - temperature environment, then the spread of the virus will be slowed. if the flu - d12 virus is exposed to ultraviolet light, then the virus will be killed, preventing human infection.

Explanation:

A good hypothesis for a virus - investigation should clearly state the independent variable (the factor being changed or tested) and the dependent variable (the factor being measured or observed). In this case, the last statement "If the Flu - d12 virus is exposed to ultraviolet light, then the virus will be killed, preventing human infection" is the best as it specifically mentions the exposure to ultraviolet light as the cause and the killing of the virus and prevention of human infection as the effect. The other statements have either less - specific or less - clear cause - effect relationships. For example, the first statement about saliva doesn't explain how saliva kills the virus clearly, the second statement about ultraviolet light doesn't mention virus killing, and the third statement about low - temperature only mentions slowing the spread not prevention of infection.

Answer:

If the Flu - d12 virus is exposed to ultraviolet light, then the virus will be killed, preventing human infection.