Flashcards
Biology 108 - Geological History part 2
Flashcards do conjunto (12)
- 1What land changes happen during the Permain period?the appearance of the north-to-south super continent, Pangaea.
- 2What biological changes happened during the Permian period?retire-like mammals appeared. reptile radiated, insects started to diversify
- 3Why happened to marine life in this period?90-95% of marine life and 70% of terrestrial species were wiped out.
- 4Why do we believe this extinction occurred?Pangaea right in the middle of the planet may have caused a disruption in ocean circulation. This would lower the oxygen levels in the water which marine life needs. There may have also been asteroid and volcanic activity.
- 5How was this extinction beneficial?It allowed for the diversity of reptiles and an increases in species diversity in general, which is true for all species extinction
- 6What are temporal openings? Why are they important?these are one or two holes in the skulls of organisms that change the function of the jaw. Different positions or the presense of the holes benefited or hindered species and allowed for more complex and thriving mammals
- 7what are the 4 types of temporal openings?anaspid = no holes such in turtles. Synapsids = one hole such as in mammals. Diapsid = 2 holes such as birds and dinosaurs. and Euyiapsid = modified diapsid in extinct predators
- 8Why are holes in the skull beneficial?It allows the muscles of the jaw to have an anchor and an area that they stretch across. This lets the muscles grow longer and stronger, meaning for effective predators
- 9describe the Triassic period in the Mesozoid era. (2 things)251-200 mya. the domination of gymnosperm plants and the radiation of dinosaurs, birds, and mammals
- 10Describe the Jurassic period in the Mesozoic Era. (2 things)200-145 mya. Th domination of the dinosaurs. gymnosperm were present
- 11Describe the Cretaceous period in the Mesozoic era. (2 things)145-65 mya. Extinction of he dinosaurs and other species. angiosperm appears.
- 12What did he cretaceous extinction effect? What did it not effect?killed off the dinosaurs, marine retiles, some land mammals, temperate zone plants, and cephalopods. it did not effect small land mammals, tropical plants, or fresh water organisms.
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- Chemistry 101 Biology 108 FlashCards sobre Biology 108 - Geological History part 2, criado por jennabarnes12387 em 29-01-2014.
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- jennabarnes12387 · jan 2014
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- 19 fev 2016
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