Evolution of Birds

What is one of the key features that make birds unique?

• Wings

• Feathers

• Fins

• Four legs

Which fossil discovery pointed to a close link between birds and reptiles?

• Archaeopteryx

• Compsognathus

• Pterosaurs

• Deinonychus

What did the discovery of theropod dinosaurs with wishbones suggest?

• Birds are related to reptiles

• Birds are related to pterosaurs

• Birds are related to theropods

• Birds are related to sauropods

What did the discovery of feathered dinosaurs reveal?

• Feathers evolved for flight

• Feathers evolved for insulation

• Feathers evolved for communication

• Feathers evolved for hunting

What is co-option in the context of evolution?

• The loss of a structure over time

• The development of a completely new structure

• The duplication of an existing structure

• The modification of an existing structure for a new use

What happened to most dinosaurs 66 million years ago?

• They migrated to another planet

• They went extinct

• They transformed into mammals

• They evolved into birds

What is the relationship between birds and dinosaurs?

• Birds and dinosaurs have no relationship

• Birds are a type of dinosaur

• Birds are the ancestors of dinosaurs

• Birds are a separate group from dinosaurs

What is the main reason why people initially found it hard to believe that birds and dinosaurs were related?

• Dinosaurs were too small

• Dinosaurs were cold-blooded

• Dinosaurs were slow-moving

• Dinosaurs were too big

What did the discovery of a dinosaur nesting ground reveal about dinosaurs?

• They laid eggs

• They were herbivores

• They cared for their young

• They were solitary creatures

What is the purpose of feathers in living birds?

• To keep them cool

• To attract mates

• To protect them from predators

• To help them fly