Scientists used to think that all dinosaurs were large and slow-moving. Which discovery overturned this idea and helped convinced the scientific community that birds evolved from dinosaurs? A. Fossils of pterosaurs confirmed that these reptiles had hollow bones and wings. B. Fossils of the small theropod dinosaur Deinonychus showed that it walked on two legs and had a large sickle-shaped claw used for slashing. C. A fossil of Compsognathus, a turkey-sized dinosaur discovered around the same time as Archaeopteryx, showed that it had features similar to those of Archaeopteryx. O. Fossils of Archaeopteryx, which was about the size of a modern-day raven, showed that it had wings and a jaw with teeth, and that it walked on two feet.
Scientists used to think that all dinosaurs were large and slow-moving. Which discovery overturned this idea and helped convinced the scientific community that birds evolved from dinosaurs? A. Fossils of pterosaurs confirmed that these reptiles had hollow bones and wings. B. Fossils of the small theropod dinosaur Deinonychus showed that it walked on two legs and had a large sickle-shaped claw used for slashing. C. A fossil of Compsognathus, a turkey-sized dinosaur discovered around the same time as Archaeopteryx, showed that it had features similar to those of Archaeopteryx. O. Fossils of Archaeopteryx, which was about the size of a modern-day raven, showed that it had wings and a jaw with teeth, and that it walked on two feet.
Chapter24: Animals Ii: The Chordates
Section: Chapter Questions
Problem 5SA: A divergence from ________ gave rise to tetrapods. a. ray-finned fishes c. cartilaginous fishes b....
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Transcribed Image Text:Scientists used to think that all dinosaurs
were large and slow-moving. Which
discovery overturned this idea and helped
convinced the scientific community that
birds evolved from dinosaurs?
A. Fossils of pterosaurs confirmed that these
reptiles had hollow bones and wings.
B. Fossils of the small theropod dinosaur
Deinonychus showed that it walked on two
legs and had a large sickle-shaped claw used
for slashing.
C. A fossil of Compsognathus, a turkey-sized
dinosaur discovered around the same time as
Archaeopteryx, showed that it had features
similar to those of Archaeopteryx.
D. Fossils of Archaeopteryx, which was about the
size of a modern-day raven, showed that it
had wings and a jaw with teeth, and that it
walked on two feet.
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