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Cretaceous: Quiz


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Question 1: As is the case today, photosynthesizing organisms, such as phytoplankton and land plants, formed the primary part of the ________ in the late Cretaceous.
CarnivoreHerbivoreFood chainPredation

Question 2: In the seas, rays, modern ________ and teleosts became common.
Angel sharkBullhead sharkGreat white sharkShark

Question 3: At the end of the Cretaceous there seem to have been no purely herbivorous or ________ mammals.

Question 4: The first radiation of the diatoms (generally siliceous, rather than calcareous) in the oceans occurred during the Cretaceous; freshwater diatoms did not appear until the ________.
LanghianPlioceneGeologic time scaleMiocene

Question 5: ________ were common in the early and middle Cretaceous, but as the Cretaceous proceeded they faced growing competition from the adaptive radiation of birds, and by the end of the period only two highly specialized families remained.

Question 6: The oceans and seas were populated with now extinct marine reptiles, ________ and rudists; and the land by dinosaurs.

Question 7: The Liaoning lagerstätte (________) in China provides a glimpse of life in the Early Cretaceous, where preserved remains of numerous types of small dinosaurs, birds, and mammals have been found.
Jehol BiotaJiufotang FormationYixian FormationDaohugou Beds

Question 8: [8] This trend was due to intense volcanic activity which produced large quantities of ________.
Carbon dioxideGreenhouse gasCarbon sinkCarbon cycle

Question 9: This is evidenced by widespread black shale deposition and frequent ________.
CretaceousAnoxic eventOcean acidificationGeologic time scale

Question 10: The Cretaceous ended with one of the largest mass extinctions in ________, the K-T extinction, when many species, including the dinosaurs, pterosaurs, and large marine reptiles, disappeared.
History of the EarthEvolutionary history of lifeGeologic time scaleGeological history of Earth


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