Which of the following is not a public health measure that would prevent disease?
a. monitoring and regulating food and water.
b. promoting vaccinations
c. promoting appropriate behaviors
d. exposing individuals to diseases to build active immunity.
i think d not sure though

What are chlorofluorocarbons made of

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

When animals eat, the food is stored and digested in the stomach or a similar structure. but when a unicellular organism like this paramecium eats, the food is stored in which organelle