Reptiles display many adaptations supporting a terrestrial lifestyle, but _____ is the most significant in reducing their dependency on an aquatic habitat.

Question

Quizplus · Accepted Answer

The amniotic egg is the most significant adaptation in reducing the dependency of reptiles on an aquatic habitat, as it allows for the development of the embryo in a self-contained environment. This means that reptiles can lay their eggs on land, and the developing embryo can receive all the necessary nutrients and oxygen from the egg's yolk and shell, without the need for an aquatic environment. While keratinized scales, ectothermy, and the three-chambered heart are also important adaptations for a terrestrial lifestyle, they do not have as significant an impact on reducing dependence on aquatic habitats as the amniotic egg.

Reptiles Display Many Adaptations Supporting a Terrestrial Lifestyle, but _____