Question

Which is the CORRECT chronological order, from the least recent to the most recent, of the four evolutionary events listed below?
P. Earliest evidence of terrestrial arthropods
Q. Appearance of Ediacaran fauna
R. Extinction of the large, non-flying dinosaurs
S. Origin of mammals

• A. P, Q, R, S
• B. Q, P, R, S
• C. P, Q, S, R
• D. Q, P, S, R

Hint:

To determine the chronological order, remember key events in the evolutionary history of life, such as the origin of mammals, the extinction of dinosaurs, and the appearance of ancient fauna.

Answer 1

The Correct Option is D

Step 1: Understanding the Events.
- P: Earliest evidence of terrestrial arthropods dates back to the Silurian period, about 430 million years ago.
- Q: The appearance of Ediacaran fauna occurred around 635 million years ago, prior to the Cambrian explosion.
- S: Mammals originated around 300 million years ago during the late Carboniferous period.
- R: The extinction of large non-flying dinosaurs happened about 65 million years ago at the end of the Cretaceous period.
Step 2: Conclusion.
Thus, the correct chronological order is (D): Q, P, S, R.