A DNA molecule is shaped like a twisted ladder, a shape that is called a(n) ?

The instructions for making proteins come originally from

Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?

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.