[Campbell Biology P.783] Based on Figure 34.25, which statement accurately describes the rel... | Practice Question

Based on Figure 34.25, which statement accurately describes the relationship between pterosaurs, birds, and dinosaurs?

  • A: Pterosaurs are considered dinosaurs, while birds are not.
  • B: Birds are considered dinosaurs, while pterosaurs are not.
  • C: Both pterosaurs and birds are considered dinosaurs.
  • D: Neither pterosaurs nor birds are considered dinosaurs.

Explanation

Figure 34.25 shows Birds branching directly from the Saurischian dinosaurs, clearly placing them within the dinosaur clade. Pterosaurs, however, branch off earlier from the Archosaur lineage, separate from the node labeled 'Dinosaurs' which includes Ornithischian and Saurischian dinosaurs . Therefore, based on this phylogeny and general biological classification, birds are considered dinosaurs, while pterosaurs are a closely related but distinct group.