Microorganisms are involved in all of the following EXCEPT
A) production of medicinal products. B) converting oxygen to a form useful to plants. C) food production. D) pollution cleanup. E) converting nitrogen to a form useful to plants.
The outbreak of measles within the last few years is due to
A) mutation of the measles virus. B) change in the environment. C) a decline in vaccination of children in the previous years. D) increase in sensitivity of detection techniques. E) emergence of novel measles viruses.