BIO 182 Chapter 25 Harvey (From Powerpoint)

fossil record
Click the card to flip 👆
1 / 42
Terms in this set (42)
reversals of the magnetic poles_______________________ have left their signature on rocks throughout the world, also providing dating informationgeologic recordThe __________________ is divided into the archean, proterozoic, adn the phanerozoic eonspaleozoicThe Phanerozoic encompasses multicellular eukaryotic life and is divided into three eras: The ___________, Mesozoic, and Cenozoic (current)MesozoicThe Phanerozoic encompasses multicellular eukaryotic life and is divided into three eras: The Paleozoic, _______________, and Cenozoic (current)CenozoicThe Phanerozoic encompasses multicellular eukaryotic life and is divided into three eras: The Paleozoic, Mesozoic, and ____________(current)extinction eventsMajor boundaries correspond to ______________ in the fossil recordstromatolitesThe oldest known evidence of lif are fossilized __________________, rock-like layers of bacteria and sediment that date back 3.5 billion years ago.prokaryotesThe sole inhabitants of Earth until about 2.1 BYAphotosynthesisMost atmospheric oxygen is of biological origin, a byproduct of _______________rusting, cyanobacteriaBy about 2.7 billion years ago, O2 began accumulating in the atmosphere and ____________ iron-ruch terrestrial rocks. The source was likely bacteria similar to modern ____________. (two answers separated by comma)eukaryoticThe oldest fossils of __________ cells date back 2.1 billion yearsthoery of endosymbiosisThe ______________ proposes that mitochondria and plastids were originally prokaryotes living within larger host cellsorganellesAncestors of _______________ may have entered their hosts as undigested prey or internal parasites, and in the process of becoming more independent, eventually became a single organismDNA and cellular machineryOrganelles replicate themselves with their own _______________colonialThe evolution of eukaryotic cells allowed for a greater range of unicellular forms, leading to emergence of _______________ formsmulticellularityA second wave of diversification occurred when true ___________ evolved, giving rise to algae, plants, fungi, and animalsalgaethe oldest known multicellular fossils are small ________ from about 1.2 BYA500 MYAmulticellular organisms began to colonize land about ___________420 MYAplants and fungi likely colonized land ______________athropods and tetrapodsbecame the most widespread and diverse land animalssupercontinentat three points, the land masses of earth have formed a _______________effects of pangeareduction in shallow water and a colder/drier inland habitat, changes in climate as continents moved toward and away from poles, changes in ocean circulation patterns, global coolingextinctThe fossil record shows that most species that have ever lived are _____________mass extinctionat times, the rate of extinction has increased dramatically and caused a ______________big fivein each of the ___________ mass extinction events, more than 50% of Earth's species became extinctnichesmass extinctions can alter ecological communities and the _______ available to organisms5 to 100It can take from ___________ million years for diversity to recover following a mass extinctionadaptive radiationrapid evolution of species as individuals spread to different environments, range from global to local areas, largely understood at the microevoltionary level and hypothesized to occur similarly in the macroevoltionary levelmammalsunderwent radiation after the extinction of terrestrial dinosaurscambrian explosionsaw the rapid emergence of most current animal phylaadaptive radiationscan occur whenever organisms colonize new environments with little competitionextinct, extantApparent trends should be always examined in a broad context, including both __________ and ________ lineages (two answers separated by commas)