The video explores the evolution of feathers, starting with the debate on whether T. Rex had feathers. It explains that feathers evolved from keratin-based structures and describes their anatomy. The discovery of feathered dinosaur fossils in the 1990s suggests that many dinosaurs had feathers. The video also discusses the possibility that pterosaurs developed feathers before dinosaurs, indicating that feathers may have originated around 250 million years ago. Despite having feathers, dinosaurs remained fearsome predators.

What is the evolutionary relationship between birds and dinosaurs?

• Birds evolved from mammals.

• Birds evolved from reptiles.

• Birds evolved from dinosaurs.

• Birds evolved from amphibians.

What is the main component of the precursors to bird feathers?

• Calcium

• Chitin

• Keratin

• Collagen

What is the central shaft of a typical feather called?

• Rekas

• Hook

• Vein

• Barbule

When were the first feather-like structures in dinosaur fossils discovered?

• 2000s

• 1990s

• 1980s

• 2010s

Which group of reptiles might have developed feathers before dinosaurs?

• Pterosaurs

• Snakes

• Lizards

• Crocodiles