Which ribosomal subunits are required for protein synthesis? Only the small subunit is required for protein synthesis. Only the large subunit is required for protein synthesis. None of the ribosomal subunits are required for protein synthesis. Both the large and small subunits are required for protein synthesis.

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.