After an outbreak of an illness, scientists use epidemiology to try to find * A. the origin of a disease.
B. how the disease spreads.
C. how to prevent the disease from spreading.
D. all of the above

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

What makes a dominant allele different from a recessive allele

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.