Question Detail
Question
The oldest era with fossils is the: a. Archeozoic b. Azotic c. Cenozoic d. Paleozoic
Correct Answer
Option A is the correct answer.
Detailed Explanation
The Archeozoic (or Archean) Era is part of the Precambrian and contains the oldest known fossils, which are simple, single-celled prokaryotes (like stromatolites). The Paleozoic is the first era of the Phanerozoic, known for its abundant, complex fossils.
Hint
This era's name means 'ancient life', and it holds the most ancient fossil evidence.