Identify the correct chronological sequence of vertebrates evolution.
(A) Dinosaurs
(B) Pelycosaurs
(C) Therapsids
(D) Thecodonts
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (B), (D), (C), (A)
(B) Pelycosaurs — first in the sequence. They were early synapsid reptiles of the Permian period. They are the oldest of the four groups.
(D) Thecodonts — second. These reptiles appear at the end of the Permian and the start of the Triassic period. The dinosaurs later arose from this line.
(C) Therapsids — third. They appear later in the Triassic period. They were mammal-like reptiles, and the mammals evolved from this line.
(A) Dinosaurs — last. They ruled the land in the Jurassic and Cretaceous periods and then died out.
In the chart of the evolutionary history of vertebrates below, the groups appear from bottom (older) to top (newer) in this very order.
Note: A similar question was also asked in CUET (UG) 2026 on 22-05-2026 (Slot 2).
NCERT Extract:
