Biology

The correct answer is: C. They are both mammals.

1. Analyze each option:

They are both vertebrates: The cladogram shows that all the animals (goldfish, rattlesnake, bird, lion, squirrel) are vertebrates as the “Vertebrate” trait is at the base before any of these animals branch off. So this is not a unique commonality between the squirrel and lion.

They both have lungs: The line for “Lungs” is before the branches for the rattlesnake, bird, lion, and squirrel. So the rattlesnake and bird also have lungs, and this is not a unique trait for just the squirrel and lion.

They are both mammals: The “Mammal” trait is placed on the cladogram in a way that only the l...