Question

list key developmental adaptations of terrestrial vertebrates.

Answer 1

Key developmental adaptations of terrestrial vertebrates are:

1. Changes in reproductive structures and behaviors such as mating behavior.

2. Development of limbs and lungs. It helps them to breathe and move around such as first seen in a primitive fish, the lungfish. Respiratory structures is much more advanced.

3. Circulatory system is changed and evolved from a 2 to 3 chambered heart.

4. Earliest vertebrates is fish that had no jaws. Therefore, they sucked and rasped flesh of their prey and not biting it such as hagfish. Later, fish arose such as cartilaginous and the bony fish have jaws.

5. Changes to the skeletal structure such as endoskeleton.