Which of these adaptations to a terrestrial existence evolved most recently?

Question

Quizplus · Accepted Answer

Seeds are the most recent adaptation to a terrestrial existence, as they evolved during the Carboniferous period (359-299 million years ago), while vascular tissue (for transporting water and nutrients) evolved during the Silurian period (443-419 million years ago), gametangia (for protection and nourishment of gametes) evolved in early land plants (around 500 million years ago), and cuticles (waxy layer to prevent water loss) evolved in the earliest land plants (around 475 million years ago).

Which of These Adaptations to a Terrestrial Existence Evolved Most