Answer:
It has to be C because the one with salt is the experiment group and the ones without salt it's the control group
Two beneficial uses of bacteria include the following:
1. <span>Microbial fermentation helps produce many foods & beverages. Latic acid bacteria are used in producing milk, yogurt, pickles, olives, etc. Bacteria are also involved in making fermentated meats, producing vinegar, chocolate, soy sauce, etc.
2. </span><span>Bacteria can be genetically modified to produce human vaccines like insulin, which is required for diabetic patients.</span>
Answer:
The correct answer is prospective cohort study.
Explanation:
A prospective cohort study is a type of observational research used in epidemiology to establish relationship between exposure and outcome.
Essentially, investigators follow two populations (one exposed to the factor under study and one not exposed) over time until the outcome occurs.
With this type of research, incidence (probability of occurrence) can be calculated, because a timeline is present.