Answer:
Monocot roots are mostly fibrous while dicot roots are mostly tap root.
Monocot root has a wide pith while dicot root does not.
The prevalence rate of a disease refers to the number of people in a population that are affected by a particular disease. The only two reasons why the number of this set of people will decrease is if a cure is found for the disease or if those affected are dying.
Cure or death will reduce the prevalence rate.<span />
The answer that goes in the blank is Division.