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) Eusthenopteron: It is a lobe-finned fish often cited as a link between Fishes and Amphibians (tetrapods), not prochordates.
• (B) Seymouria: It is a transitional form between Amphibians and Reptiles, not fishes and amphibians.
• (C) Archaeopteryx: It is a famous missing link between Reptiles and Birds, not amphibians and reptiles.
• (D) 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.