WHS Biology Junco 9b Bird Evolution

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What characteristics does the 150 million year old bird (archaeopteryx) have with most living reptiles?

• Wings

• Claws and a bony tail

• A beak and no teeth

• Larger than a cow

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Transitional fossils are species with traits in between an old ancestor and a more recent species. Charles Darwin did not find a transitional fossil, but he predicted their existence? Why?

• An individual organism can change into a new organism during its lifetime, creating these fossils.

• All species alive today had to evolve from something that lived in the past.

• All fossils ever made will be discovered at some point.

• Species alive today are the same as species alive millions of years ago.

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What evidence did scientists find to suggest that dinosaurs could be small and quick and not only large and slow?

• The discovery of dinosaurs that could swim

• The discovery of dinosaurs with armor plates

• The discovery of dinosaurs that walked on two legs

• The discovery of fast moving two legged dinosaurs

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What evidence did Jack Horner find in 1978 that helped link dinosaurs to birds?

• Dinosaurs used nests with eggs and cared for the young

• Dinosaurs had strong bones

• Dinosaurs ate many insects and plants

• Dinosaurs have wishbones

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Which of the following characteristics are shared between modern birds and their reptile ancestors?

• Flight

• A S-Shaped Neck

• Long bony tails

• Sharp teeth

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Which of the following main ideas is supported by the film?

• Feathered birds evolved after the extinction of the dinosaurs

• Dinosaurs and birds are both warm-blooded (endothermic)

• Birds evolved one trait at a time

• Only toothless birds survived the great extinction event 66 million years ago.

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Why do scientists think that the first feathers were not for flight?

• The feathers were too small

• Not all birds fly

• Bats can fly without feathers

• Many large feathered dinosaurs could not fly

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How do transitional fossils and forms support the theory of evolution?

• Transitional forms show descent with modification and change

• DNA can be reliably taken from very old fossils

• We can find every transitional form that was ever made

• Transitional forms do not support the theory of evolution

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