Question

Choose the correct pair

• A. Eusthenopteron - Prochordates and fishes
• B. Seymouria - Fishes and amphibians
• C. Archaeopteryx - Amphibians and reptiles
• D. Cynognathus - Reptiles and mammals

Hint:

{Evolutionary Links to remember:}

• {Peripatus}: Annelida & Arthropoda.
• {Neopilina}: Annelida & Mollusca.
• {Balanoglossus}: Non-chordates & Chordates.
• {Archaeopteryx}: Reptiles & Birds.

Answer 1

The Correct Option is D

Step 1: Analyze the Evolutionary Links:
We need to identify the correct missing link or connecting link between the stated groups.
(A) \textit{Eusthenopteron:} It is a lobe-finned fish often cited as a link between **Fishes and Amphibians** (tetrapods), not prochordates.
(B) \textit{Seymouria:} It is a transitional form between **Amphibians and Reptiles**, not fishes and amphibians.
(C) \textit{Archaeopteryx:} Famous missing link between **Reptiles and Birds**, not amphibians and reptiles.
(D) \textit{Cynognathus:} It belongs to the group Cynodontia (Therapsids), which are mammal-like reptiles. It serves as a link between **Reptiles and Mammals**.

Step 2: Conclusion:
Option (D) correctly pairs the organism with the groups it connects.