What is one difference between dna and rna?
a. only dna contains the base adenine.
b. only rna contains the base guanine.
c. only rna contains the sugar fructose. eliminate
d. only dna contains the sugar deoxyribose.?

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.