Biology

The correct answer is: A. C and D because they share one common branch.

1. Understand the relationship between phylogenetic trees and derived traits:

In a phylogenetic tree, organisms that share a more recent common ancestor tend to share more derived traits. Derived traits are characteristics that have evolved in a particular lineage. The closer two organisms are on the tree in terms of the most recent common ancestor they share, the more derived traits they will have in common.

2. Analyze each option:

“C and D because they share one common branch”: C and D share a relatively recent common ancestor. The common branch they share indicates that they have diverged from a single lineage more recently compared to other pairs. This means they have had less time for their traits to diverge, so they likely share more derived traits.

“C and D because they are closest to t...