Exploring the Truth Behind Dinosaur Extinction

What is the main idea presented about birds in the introduction?

• Birds are the ancestors of dinosaurs.

• Birds are a separate group from dinosaurs.

• Birds are living dinosaurs.

• Birds evolved from mammals.

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Which group of animals branched off first from the common ancestor of all tetrapods?

• Mammals

• Amphibians

• Reptiles

• Birds

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What is the significance of Archaeopteryx in the study of bird evolution?

• It was the first bird to fly.

• It shows the transition between reptiles and birds.

• It was the largest dinosaur.

• It had no feathers.

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Which feature is NOT shared by both birds and dinosaurs?

• Teeth

• Wishbones

• Long tails

• Feathers

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What adaptation helped dinosaurs and birds maintain balance as they became front-heavy?

• Shorter necks

• Larger feet

• Crouching posture

• Longer tails

What did scientists discover when they attached prosthetic tails to chickens?

• Chickens could fly.

• Chickens became more aggressive.

• Chickens adopted a more dinosaur-like walk.

• Chickens grew larger.

Why do scientists believe that extinct dinosaurs had feathers?

• Feathers were used for camouflage.

• They needed feathers for flight.

• Feathers helped them swim.

• Fossil evidence shows feather imprints.

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What is tetrachromacy in birds?

• Having four wings

• Ability to fly long distances

• Having four color receptors

• Ability to see in the dark

What likely helped smaller meat-eating dinosaurs survive the mass extinction event?

• Smaller bodies and less food requirement

• Ability to fly

• Living in water

• Larger bodies

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What organ do modern birds use to create their complex songs?

• Trachea

• Syrinx

• Larynx

• Bronchi