GLYquestions04 - Topic 08 1. Flowering trees and grasses...

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Unformatted text preview: Topic 08 1. Flowering trees and grasses evolved during the Middle Triassic. 2. Global sea level has been relatively constant throughout geologic history. 3. If the average rate of seafloor spreading increases on a global basis, ridge volume decreases. 4-. For most of the Mesozoic, occurred along the western margin of North America causing the formation of volcanic arcs and numerous collisional events of volcanic arcs and microcontinents. 5. Although Pangaea was beginning to rift apart in the the still connected continents facilitated widespread dispersal of the dinosaurs. 6. The Late Jurassic partial breakup of Pangaea and higher sea level increased the proximity of large land areas to the moisture of the ocean; as a result, climate became more continental (warmer with less seasonality) and drier. 7. Monsoons are caused by seasonal differences in temperatures and atmospheric pressure between oceans and continents. 8. During the Triassic, Gondwana was north of the equator. 9. During the Cretaceous, cool temperate forests covered the polar regions where there was seasonal snowfall and thick ice sheets. 10. The continued warm climate of the Late Cretaceous, combined with higher than average seafloor spreading rates, resulted in the highest sea level of the Mesozoic. 11. During the Early Cretaceous, conifers became dominant over cycads. 12. The Tethys Seaway divided Africa from Europe in the Middle Jurassic, separating African dinosaurs from their cousins to the north. 13. During the Late Jurassic, an interior seaway called the Sea formed in North America, extending from the Arctic almost to the Gulf of Mexico. 14-. During the Jurassic, western North America was covered by expansive eolian sands. 15. Late Cretaceous sea level was so high that it flooded the entire Atlantic and Gulf coastal plains of the United States. 16. By the Middle Jurassic, sea level began to rise again, continuing to a high in the 17. During the Late Cretaceous, forests grew in coastal Antarctica and in Canada as far north as 85 degrees N latitude. 18. The rise of Late Jurassic sea level continued into the Cretaceous. 19. Closer toward the margins of Pangaea, climates of alternating wet and dry seasons were common. 20. Higher Late Jurassic sea level flooded the low lying portions of continents creating the sea 21. Dry and hot desert conditions persisted in many interior continental areas of Pangaea during the Early and Middle Jurassic. 22. During the Triassic, sea level was higher than today but lower than the later Mesozoic. 23. The Connecticut River Valley was a Mesozoic containing abundant dinosaur footprints. 24-. The average elevation of physiographic regions of the ocean basins can change over time, as a consequence of changes in the rates of 25. At their maximum, Cretaceous seas covered approximately half of the present land area of the earth. 26. Higher average temperatures cause some expansion of ocean waters and raise sea level. 27. Rocks of the Upper Jurassic contain more diverse and abundant dinosaur fossils than those of the earlier Jurassic. 28. Plate tectonic events inhibited early dinosaur dispersal. 29. At the peak of Mesozoic warmth, in the Cretaceous, the pole to equator temperature gradient was probably no more than degrees C. 30. The lack of global glaciation can cause major flooding of continents. Topic 09 1. The elevation above which trees cannot grow because of snow and very cold temperatures is known as the: 2. The earliest vascular plants date back to the Period. 3. The angiosperm reproductive system is enhanced by the pollination of animals, especially insects. 4-. grows in wet or damp areas often carpeting rocks and decaying wood on the forest floor. 5. All the modern conifer families were already members of the Early Mesozoic landscape. 6. are cone bearing gymnosperms with seeds resting on the projecting scales of their cones. 7. plants are those lacking specialized cells for the movement of nutrients and water. 8. The first large forests of vascular plants filled wetlands during the Period. 9. Ferns are ancient plants dating back long before dinosaurs. 10. Simple non-vascular plants like bryophytes were among the earliest land plants. 11. The ancient group of conifers known as Araucariaceae survive today in natural habitat and are most common in this region of the world: 12. For most of Earth history, the land has been virtually void of all plant life. 13. These plants are small and low growing because they lack a water vascular system: 14-. Our solar system is about 4.6 billion years old. 15. Spores are produced in structures called on the underside of fern fronds (leaves). the prominent browns spots 16. An ancient group of conifers is the family that still grows today in the Southern Hemisphere. 17. Sphagnum or peat moss is an example of a 18. During the , angiosperms began overcoming non-flowering plants as the dominant land plants. 19. High browsing declined markedly between the Late Jurassic and Early Cretaceous. 20. Fossil fruit has never been in Mesozoic sedimentary rocks: 21. Seedless vascular plants were the earliest land plants. 22. are seedless, spore producing, vascular plants Whose reproductive system ties them to moist environments. 23. are seed producing plants Where the seed is exposed (not enclosed, e.g., woody scales of pine cone). 24-. Seed ferns are among the earliest seed-producing plants. 25. The Late Triassic decline in the distribution and abundance of these plants may be the result of increased grazing by dinosaur herbivores: ...
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GLYquestions04 - Topic 08 1. Flowering trees and grasses...

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