The great evolutionary split
Skin, lungs, and breathing secrets
From jelly eggs to tough shells
Mastering the extremes
sonia Sort creatures from squish to shell to discover how amphibians and reptiles differ.
sonia Reptile eggs contain a complex life-support system that allows embryos to develop safely on dry land.
Where does the male Darwin's frog shelter its tadpoles until they are fully developed?
sonia Amphibians and Reptiles
Amphibians lay their jelly eggs in water, soft and bright, But reptiles use their tough-shelled eggs on land, bathed in sunlight!
sonia Amphibians have evolved some of the wildest parenting strategies in the animal kingdom to protect their soft eggs.
For green sea turtles, what environmental factor determines the biological sex of the hatchlings?
Vocal sac nurseries: Male Darwin's frogs keep their developing tadpoles safe inside their vocal sacs until they hop out as froglets.
Which membrane in the amniotic egg is responsible for storing the embryo's nitrogenous waste?
A shelled egg containing specialized membranes that protect and nourish a developing embryo. This evolutionary milestone allowed early reptiles to colonize dry land during the Carboniferous period.