Discussion
Which of the following sequences is the correct order of appearance in the geological history of Earth :
Answer: C
The correct order is Fishes-Dinosaurs-Flowering plants-Whales.
- Fishes: the first jawless fishes appear in the Cambrian and Ordovician, about 500 Ma.
- Dinosaurs: Late Triassic, about 230 Ma.
- Flowering plants: Early Cretaceous, about 130 Ma.
- Whales: Eocene, about 50 Ma.
Options A and B put dinosaurs last, after whales, though dinosaurs (other than birds) were extinct 66 Ma ago, before the first whales; option B also puts flowering plants before fishes. Option D puts whales before flowering plants.
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