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Dnsr notes 24
West Side Story: Laramidia
| Question | Answer |
|---|---|
| Which sea way divided eastern and western portions of n america? | Cretaceous Interior Seaway (during the late cretaceous) |
| What were these two separated lands called? | Appalachia in the east and laramidia in the west |
| Did the cretaceous interior seaway stay static? | No, it constantly fluctuated |
| In the Late Cretaceous, which dinosaur species dominated the ecosystem in various parts of the globe? | Sauropods |
| Which other group in saurischians greatly diversified in the Cretaceous? | Theropods |
| In the group, maniraptorans, which species diversified? | dromaeosaurs, oviraptorosaurs, and therizinosaurs. |
| In the southern hemisphere ecosystems, who was the dominant meat-eater? | abelisaurs |
| Who were the dominant meat eaters in the north? | Tyrannosaurids |
| In which hemisphere did anklyosaurs diversify the most? | Northern hemisphere |
| Where did hadrosaurids diversify the most? | Asia, North America, and several other continents |
| In which hemisphere did the marginocephalians diversify? | Northern |
| How do angiosperms differ from gymnosperms? | Angiosperms grow covering for seeds (such as fruit) so animals can eat and deposit. Gymnosperms are naked seeds. |
| What are Teridophytes? | Plants that come from the water (moss, ferns, horse tails) |
| What is the last 18 million years of the Cretaceous called? It extends from about 83 to 65 myo. | Campanian and Maastrichtian |
| Where is the most complete dinosaur fossil record? | Laramidia |
| Which dinosaurs lived on Laramidia? | Theropods (tyrannosaurids, dromaeosaurs, troodontids, oviraptorosaurs), Ceratopsians, hadrosaurids, anklyosaurs. |
| Which of these groups is the most common? | Hadrosaurids and ceratopsids |
| What do the fossils found suggest about all groups of dinosaurs? | They were restricted to one region instead of engaging in long-range migratory behavior. |
| Why would plants and animals be endemic to a restricted province? | Latitudinal zonation of temperature and rainfall |
| Utah sits on a biozone? What's a biozone? | A biozone is the boundary. In this case, Utah sits on the boundary of North and South. |
| What are other key factors as to why the dinos would be endemic to a restricted area? | plant ecology and seaway fluctuation |
| What are the two steps to creating a new species? | Species must be isolated and then diverge so greatly that they do not recognize one another as a potential mate. |
| When was the Maastrichtian? | The end of the Cretaceous (70-65 myo) |
| What was the Cretaceous Interior Seaway doing during the Maastrichtian? | It was shallow and connected Laramidia and Appalachia |
| Most complete fossil record is where? | Western North America |
| How long ago was the Maastrichtian? | 60-65 mya (last 4 million years of the cretaceous) |
| How long was the Campanian | 80-70 mya |
| Which group completely died out during the cretaceous? | STEGOSAURS! NOOOO!! |
Created by:
Chelseagirl2508
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