Question

consider these phylogenetic trees. the first tree is based on physical characteristics. the second tree is based on structure, genetics, and evolutionary history.

two phylogenetic trees are shown here, with labels duck, platypus, opossum on branches

which can be concluded from a comparison of the two phylogenetic trees?

• phylogenetic trees are not subject to change.
• classification can change with new discoveries and evidence.
• classification does not change with more evidence.
• phylogenetic trees are inaccurate.

Explanation:

The first phylogenetic tree is based on physical characteristics, while the second uses more comprehensive data (structure, genetics, evolutionary history). The difference in the trees shows that as new evidence (like genetic data) is discovered, classification (phylogenetic relationships) can change. The other options are incorrect: phylogenetic trees can change with new info, so "not subject to change" is wrong; "does not change with more evidence" contradicts the example; and "inaccurate" is too broad as the second tree is more informed, not inaccurate.

Answer:

B. Classification can change with new discoveries and evidence.