A) Around 251.902 million years ago, marking the boundary between the Permian and Triassic periods. B) Around 252.2 million years ago, marking the boundary between the Devonian and Carboniferous periods. C) Around 65 million years ago, marking the boundary between the Cretaceous and Paleogene periods. D) Around 443 million years ago, marking the boundary between the Ordovician and Silurian periods.
A) 50% B) 81% C) 95% D) 70%
A) The Deccan Traps B) The Siberian Traps C) The Columbia River Basalt Group D) The Yellowstone Caldera
A) From around 500 ppm to 3,000 ppm B) From around 400 ppm to 2,500 ppm C) From around 280 ppm to 1,500 ppm D) From around 350 ppm to 2,000 ppm
A) 1 million years B) 10 million years C) 60 ± 48 thousand years D) 100,000 years
A) A decrease of 10–15% B) A large, abrupt global decrease of 4–7% C) An increase of 5–10% D) An increase of 2–4%
A) 5 °C (9 °F) B) 10 °C (18 °F) C) 15 °C (27 °F) D) 8 °C (14 °F)
A) A decrease in plant spores B) A 'fungal spike' in abundance C) An increase in algal fossils D) A decrease in fungal spores
A) Whether they were more severe in marine environments B) Whether they were caused by the same factors C) Whether they were synchronous or asynchronous D) Whether they occurred before or after the event
A) A mass extinction in the late Permian that closely preceded the Permian–Triassic event B) A mass extinction during the Triassic period C) A mass extinction during the Jurassic period D) A minor extinction event with no significant impact
A) One to three distinct pulses B) Two distinct pulses C) Five distinct pulses D) A single, continuous extinction event
A) It marks the beginning of the Mesozoic era B) It is used to date the Cretaceous-Paleogene boundary C) It indicates the end of the Paleozoic era D) It is used to delineate the Permian-Triassic boundary
A) 100,000 years B) Approximately 500,000 years C) 10,000 years D) 1 million years
A) Uniform fossil records across all regions B) Lack of fossil evidence C) Statistical analyses of fossiliferous strata and studies of different sections D) A single, sharp extinction peak
A) Increased solar activity B) Destruction of the ozone layer C) Volcanic ash clouds D) Methane emissions
A) It indicates the presence of volcanic activity B) It helps identify the extinction boundary in rocks unsuitable for radiometric dating C) It measures the temperature changes during the event D) It measures the oxygen levels in ancient oceans
A) Whether it indicates a decrease in plant life B) Whether it represents a true increase in fungi or a different phenomenon C) Whether it is found worldwide D) Whether it marks the beginning of the Triassic period
A) Approximately 3,900 to 12,000 gigatonnes B) 1,000 to 5,000 gigatonnes C) 5,000 to 10,000 gigatonnes D) 20,000 to 30,000 gigatonnes
A) They indicate the presence of algal fossils B) They measure the oxygen levels in ancient oceans C) They are used to identify the boundary in rocks unsuitable for radiometric dating D) They indicate the presence of volcanic activity
A) Whether it affected marine or terrestrial species more B) Whether it occurred before or after the Capitanian extinction C) Whether it was caused by volcanic activity or an extraterrestrial impact D) Whether it was a single, sharp peak or spread out over millions of years
A) It indicates the presence of volcanic activity B) It measures the oxygen levels in ancient oceans C) It measures the temperature changes during the event D) It coincides with the extinction and is used to identify the boundary in unsuitable rocks
A) It closely preceded the Permian–Triassic event and may have contributed to its severity B) It occurred after the Permian–Triassic event C) It had no significant impact on the Permian–Triassic event D) It occurred during the Triassic period
A) Articulate brachiopods B) Crinoids C) Conodonts D) Ceratitida order of ammonites
A) Brachiopods B) Bryozoans C) Cnidarians D) Bivalves
A) The Darwin effect B) The Lilliput effect C) The Wallace effect D) The Brobdingnag effect
A) Cosmopolitan taxa B) Bivalve taxa C) Crinoids D) Articulate brachiopods
A) Squaliform sharks B) Lamniform sharks C) Cladodontomorph sharks D) Carcharhiniform sharks
A) Deep-water sponges B) Bryozoans C) Shallow-water sponges D) Crinoids
A) Bryozoans B) Crinoids C) Deep-water sponges D) Shallow-water sponges
A) 50% B) 75% C) 91% D) 100%
A) Bivalves B) Ammonoids C) Brachiopods D) Conodonts
A) Ostracods B) Foraminifera C) Crinoids D) Bryozoans
A) 50% B) 25% C) 75% D) 100%
A) Ammonoids B) Bryozoans C) Foraminifera D) Crinoids
A) Brachiopods B) Foraminifera C) Crinoids D) Bryozoans
A) Fusulinida B) Textulariina C) Lagenida D) Miliolida
A) Miliolida B) Lagenida C) Textulariina D) Fusulinida
A) Fusulinida B) Miliolida C) Lagenida D) Textulariina
A) Dipteroids B) Palaeodictyopteroids C) Coleopteroids D) Lepidopteroids
A) Gigantopteris B) Glossopteris C) Lycopodiophyta D) Cordaites
A) East Greenland B) North China C) Jordan D) Australia
A) Large coniferous trees B) Smaller herbaceous plants C) Mosses D) Ferns
A) Lycopodiophyta B) Glossopteris C) Gigantopteris D) Cordaites
A) Catastrophic B) Moderate C) Insignificant D) Severe
A) Lycopodiophyta B) Gigantopteris C) Cordaites D) Glossopteris
A) Gymnosperms B) Angiosperms C) Ferns D) Mosses
A) Gradual evolution B) Minor adjustment C) No change D) Massive rearrangement
A) Superficial B) Severe C) Moderate D) Negligible
A) Glossopteris B) Cordaites C) Gigantopterid D) Lycopodiophyta
A) Glossopteris B) Gigantopteris C) Lycopodiophyta D) Conifer flora
A) Pelycosaurs B) Procolophonids C) Gorgonopsians D) Anapsid reptiles
A) Marine vertebrates B) Crinoids C) Bivalves D) Brachiopods
A) Ammonoids B) Crinoids C) Bivalves D) Bryozoans
A) Bryozoans B) Xiphosurans C) Bivalves D) Crinoids
A) Increased predation pressure B) Widespread anoxia C) Rapid climate cooling D) High levels of volcanic activity
A) Mangrove forests B) Wave-dominated shoreface settings (WDSS) C) Deep-sea hydrothermal vents D) Coral reefs
A) Increased predation pressure B) High volcanic activity C) Rapid climate cooling D) Recurrent environmental calamities
A) Crinoids B) Scleractinian corals C) Bryozoans D) Brachiopods
A) Crinoids B) Tubiphytes C) Bryozoans D) Sponges
A) Metazoan reefs B) Microbial reefs C) Bryozoan reefs D) Crinoid reefs
A) Metazoan reefs B) Microbial reefs C) Bryozoan reefs D) Crinoid reefs
A) Crinoid reefs B) Metazoan reefs C) Microbial reefs D) Bryozoan reefs
A) Pteridophytes B) Lycophytes C) Pteridosperms D) Cycadophytes
A) Prevalence of bennettitaleans and cycads B) Dominance of cavate trilete spores C) Abundance of Dicroidium flora D) Endosporites papillatus–Pinuspollenites thoracatus assemblages
A) A shift towards assemblages dominated by cavate trilete spores B) A shift towards dominance by gymnosperms C) A shift towards dominance by lycophytes D) A shift towards dominance by pteridophytes
A) Increased volcanic activity B) Massive die-offs of lycophytes C) Global cooling D) Paleocommunities recovery
A) Coal gap B) Sediment gap C) Fossil gap D) Extinction gap
A) Increased oxygen levels B) Increased sunlight C) Decreased rainfall D) Decreased carbon dioxide levels
A) A temperate climate B) A cold climate C) A desert climate D) A tropical climate
A) Some temnospondyls B) Some dinosaurs C) Some mammals D) Some reptiles
A) East-central Pangaea B) South-central Pangaea C) West-central Pangaea D) North-central Pangaea
A) East China B) West China C) North China D) South China
A) 15 Myr B) 20 Myr C) 5 Myr D) 10 Myr
A) About 10 Myr B) About 15 Myr C) About 20 Myr D) About 5 Myr
A) Mineral evidence B) Sedimentary rock evidence C) Fossilized plant evidence D) Coprolitic evidence
A) At least eight B) At least ten C) At least four D) At least six
A) Herbivores B) Decomposers C) Vertebrate predators D) Invertebrate predators
A) Geochemical evidence B) Paleontological evidence C) Biological evidence D) Geological evidence
A) Less provincialism B) More provincialism C) More variability D) More heterogeneity
A) 30% B) 70% C) 90% D) 50%
A) A biostratigraphic marker B) A climatic indicator C) A geological marker D) A biological indicator
A) Extremely fast growth rate B) Slow growth rate C) Small size D) Camouflage
A) Australia B) Antarctica C) Africa D) Asia
A) Anapsids B) Cynodont therapsids C) Synapsids D) Therapsids
A) Burrowing B) Climbing C) Flying D) Swimming
A) Sauropsids B) Dipnoans C) Temnospondyls D) Archosaurs
A) Scales B) Gills C) Feathers D) Fur
A) Archosaurs B) Tupilakosaurids C) Dipnoans D) Therapsids
A) Protorthoptera B) Glosselytrodea C) Ceratodontiform lungfishes D) Miomoptera
A) Insect fossils B) Archosaurs C) Microbially induced sedimentary structures (MISS) D) Temnospondyls
A) Hydrochloric acid B) Oxygen C) Helium D) Nitrogen
A) Mercury poisoning B) Decrease in mercury levels C) Increased oxygen levels D) No significant consequence
A) Cinder cone volcanism B) Hotspot volcanism C) Large igneous province activity D) Subduction-zone volcanism
A) The 2004 Indian Ocean tsunami B) The 2010 Deepwater Horizon oil spill C) The 2011 Fukushima nuclear disaster D) The 1986 Lake Nyos disaster
A) Volcanic eruptions B) Oxidation of shallow marine sediments C) Reduction in organic activity D) Methane clathrate gasification
A) Eruptions massively larger than any found B) Eruptions slightly larger than any found C) Eruptions of the same size as any found D) Eruptions smaller than any found
A) Methane from clathrates B) Volcanic carbon dioxide C) Methane from wetlands D) Carbon monoxide from wildfires
A) Echinoderms. B) Close relatives without calcareous hard parts, such as sea anemones. C) Rugose and tabulate corals. D) Calcareous sponges.
A) A normal aragonite sea. B) A calcite sea. C) A dolomite sea. D) An extreme aragonite sea.
A) Hopane anomalies. B) Carbonate anomalies. C) Silica anomalies. D) Iron anomalies. |