Clinical trials occur under very specialized, controlled conditions that do not represent everyday life. generalizing the results obtained in this environment to populations not engaged in the research is a concern for this type of study.

Randomized Clinical Trial

In this type of study, assigned or randomized people are grouped in two and are followed over time to see which group achieves a particular result. The two groups receives different interventions. The outcomes for each are then evaluated and the risk of one group developing the result are compared and calculated.

answer///multiple alleles;

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.