Biology Evolution SZABMU 2022
PMDC Verified Question 38 of 47
Among the oldest known fossils comes the:
A
Prokaryotes
B
Amphibians
C
Reptiles
D
Fishes
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Prokaryotes
Concept:

The fossil record provides a chronological history of life on Earth, showing a progression from simple unicellular life to complex multicellular organisms.

Solution:

  • The oldest undisputed fossil evidence points to the existence of prokaryotes (ancient bacteria).
  • These fossilized remnants (often found in stromatolites) date back approximately 3.5 billion years.
  • All other complex life forms (fishes, amphibians, reptiles) evolved much later in Earth's geological history.


Why other options are incorrect:

  • Fishes, amphibians, and reptiles are all vertebrates (eukaryotes) that appeared hundreds of millions of years ago, which is billions of years after prokaryotes.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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