ANSWERS
A sudden extinction event
A) all of these
B) would explain why there are no dinosaur fossils found above the KT boundary
C) could have been caused by a large meteor impact
D) can be caused by one large volcano eruption that blocks out the sun through a
growing season or releasing gases that could change the average global temperatures
abruptly - Answer- All of these
Is credited for finding the dinosaur fossils showing that feathered theropods existed -
Answer- Paleontologist Xu Xing
The extinction of dinosaurs
A) all of these
B) is still debated in science as one of the greatest mysteries of the dinosaurs
C) made an ecological opening for other animals to become dominant
D) ended the Cretaceous time period - Answer- All of these
Proposed physical causes for extinction
A) none of these
B) medical problems
C) racial senescence
D) biotic interactions - Answer- None of these
Which of the following paleontologists first used the term Dinosauria? - Answer- Richard
Owen
Dinosaurs
A) all of these
B) were surrounded by mammals during the Triassic, Jurassic, and Cretaceous
C) were surrounded by other reptiles during the Triassic, Jurassic, and Cretaceous
D) could have seen birds in the Cretaceous - Answer- All of these
Proposed physical causes for extinction include