Write the letter of the term or phrase that best describes how each numbered item function? 1. Virus envelope A. security guards get sick and die
2. bacteriophage B. door key
3. HIV infection C. a rumor being spread among people
4. influenza D. a hypodermic needle

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water