Based on the long term observations of tortoises, it would appear that variations of traits provide an
advantage in different environments. From the list below and using the information provided in the
background materials, identify the tortoise variations that have most likely provided a survival advantage
to tortoises on both Hood and Isabela Islands.
100
Short necks
Flat Shells
Long tails
Long necks
Flippers
Large domed shells
Saddle shaped shells