Question

According to paleontological evidences, identify the correct sequence of normal development?

• A. Fish $\to$ Reptiles $\to$ Amphibians $\to$ Birds $\to$ Mammals
• B. Fish $\to$ Reptiles $\to$ Orids $\to$ Amphibians $\to$ Mammals
• C. Fish $\to$ Amphibians $\to$ Birds $\to$ Reptiles $\to$ Mammals
• D. Fish $\to$ Amphibians $\to$ Reptiles $\to$ Birds $\to$ Mammals

Answer 1

The correct option is D Fish $\to$ Amphibians $\to$ Reptiles $\to$ Birds $\to$ Mammals

• The first vertebrate to evolve is the bony fish. Before that, there were jawless fish.
• The amphibians evolved next after fish. This is the first vertebrate to live both on land and in water.
• They have few characteristics of fish in their early life. The reptiles evolved from the amphibians.
• They live entirely on land. From the amphibians, there developed certain added features such as feather, hollow bones and warm blood. These animals were called as birds or aves.
• The mammals have evolved from the birds which can give birth to the new ones.

Thus, the correct answer is option D.