Vertebrate colonization of terrestrial habitats increased dramatically with the evolution of

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The evolution of shelled eggs allowed vertebrates to reproduce on land without the need for water. This crucial adaptation enabled vertebrates to colonize and thrive in terrestrial habitats. Lungs, paired appendages, the four-chambered heart, and scales also contributed to the success of terrestrial vertebrates, but shelled eggs were the most important factor in allowing them to survive and reproduce outside of aquatic environments.

Vertebrate Colonization of Terrestrial Habitats Increased Dramatically with the Evolution