Question

What is the correct order (old to recent) of periods in Paleozoic era?

• A. Silurian, Devonian, Permian, Carboniferous
• B. Silurian, Devonian, Carboniferous, Permian
• C. Permian, Devonian, Silurian, Carboniferous
• D. Silurian, Carboniferous, Permian, Devonian

Answer 1

The Correct Option is B

The question asks for the correct chronological order of periods in the Paleozoic era, starting from the oldest to the most recent.

The Paleozoic era is part of the Phanerozoic Eon and is divided into several periods listed chronologically. Here are the periods in the correct order:

1. Silurian
2. Devonian
3. Carboniferous
4. Permian

Let's explain why the given sequence is correct:

• Silurian Period (443.8 – 419.2 million years ago): It is the earliest in the sequence provided in the options. This period is known for the stabilization of the Earth's climate and the evolution of fish.
• Devonian Period (419.2 – 358.9 million years ago): Following the Silurian, the Devonian period is marked by significant diversification of plant and animal life.
• Carboniferous Period (358.9 – 298.9 million years ago): Characterized by vast swamp forests, this period is critical for the development of the extensive coal beds for which it was named.
• Permian Period (298.9 – 251.9 million years ago): The last period of the Paleozoic era, it ended with the largest mass extinction in Earth's history.

Therefore, the correct sequence from the options provided is: Silurian, Devonian, Carboniferous, Permian, which matches the correct chronological order of these periods in the Paleozoic era.

This explanation shows why the correct option is 2^{nd} in the list of given options.

By contrasting each option, it becomes clear why this particular sequence is accurate:

• Option 1: Silurian, Devonian, Permian, Carboniferous - Incorrect because Permian comes after Carboniferous.
• Option 3: Permian, Devonian, Silurian, Carboniferous - Incorrect due to wrong starting period.
• Option 4: Silurian, Carboniferous, Permian, Devonian - Incorrect as it places Devonian at the end.

Thus, option 2 is the correct order of periods in the Paleozoic era.