On a phylogenetic tree, what is used to group organisms into clades?
Answer and explanation
Correct answer: B. Shared derived characteristics
- Step 1: A clade includes an ancestor and all its descendants. Step 2. Shared derived traits show common ancestry. Answer: shared derived characteristics. Why not the others: Analogous traits arise through convergent evolution in distinct lineages facing similar environmental pressures, rather than through divergence from a common ancestral anatomical structure.
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