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