What was Darwin’s conclusion about the shells in Santiago

Darwin noticed that the plants and animals on the different islands also differed. For example, the giant tortoises on one island had saddle-shaped shells, while those on another island had dome-shaped shells (see Figure below). People who lived on the islands could even tell the island a turtle came from by its shell.

Explanation:

answer; i believe the correct answer is (replication is not conservative);

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.