https://padlet.com/jennashaw1/hbsbrfajm6qsmr32 Bio, 3rd period . Mrs.Nickerson en-us 2021-03-06 06:24:09 UTC 2021-03-06 07:42:10 UTC hello@padlet.com jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276244660 Orodovician-silurian]]> 2021-03-06 06:26:01 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276244660 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276246237 This was a global extinction event occuring during the Hirnantian Age (445.2 million to 443.8 million years ago) This extinction seemed to happen in phases, some paleontologist suggest that an early phase affecting graptolits , branchiopods, and trilobites took place prior to the end of the Orodovician period, ]]> 2021-03-06 06:28:58 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276246237 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276249095 Devonian ]]> 2021-03-06 06:34:27 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276249095 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276249819 This extinction affected mostly the marine communites , (419.2 million to 359 million years ago ) It was impossible to blame this on any one cause, some of there best guesses were, ecsessive sedimentation, rapid global warming, bolide impacts, or massive nutrient runoffs. ]]> 2021-03-06 06:35:47 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276249819 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276251511 Permian-triassic]]> 2021-03-06 06:39:01 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276251511 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276252538 a series of extinction pulses that contributed to the greatest mass extinction in Earth’s history. Many geologists and paleontologists thought that the Permian extinction happened over 15 million years during the latter part of the Permian period(299 million to 252 million years ago).Permian extinction events have focused on how biological and physical causes disrupted nutrient cycles. Hypotheses of temperature crises, especially of those occurring in shallow marine (surface) waters, ]]> 2021-03-06 06:40:52 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276252538 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276254220 Triassic-jurassic]]> 2021-03-06 06:43:56 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276254220 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276263553 global extinction event occurring at the end of the Triassic period  (252 million to 201 million years ago) that resulted in the death of some 76 percent of all marine and terrestrial species and about 20 percent of all taxonomic families.The cause of the end-Triassic extinction is unknown. Many scientists contend that this event was caused by climate change and rising sea levels resulting from the sudden release of large amounts of carbon dioxide. ]]> 2021-03-06 07:01:40 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276263553 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276268966 Cretaceous-tertairy ]]> 2021-03-06 07:11:32 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276268966 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276269825  a global extinction event responsible for eliminating around 80 percent of all speices of animals ,  about 66 million years ago. The only species that survived the extinction were the lineages that led to modern birds and crocodilians. Some of there main guesses to the extinctions were causes include disease, heat waves and resulting sterility, freezing cold spells, the rise of egg-eating mammals, and X-rays from a nearby exploding supernova. ]]> 2021-03-06 07:12:50 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276269825 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276272659 https://www.britannica.com/science/end-Triassic-extinction]]> 2021-03-06 07:17:48 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276272659 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276272936 https://www.britannica.com/science/K-T-extinction]]> 2021-03-06 07:18:22 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276272936 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276273528 https://www.britannica.com/science/Permian-extinction]]> 2021-03-06 07:19:22 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276273528 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276273912 https://www.britannica.com/science/Devonian-extinctions]]> 2021-03-06 07:19:57 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276273912 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276274139 https://www.britannica.com/science/Ordovician-Silurian-extinction]]> 2021-03-06 07:20:23 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276274139 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276279018 2021-03-06 07:28:35 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276279018 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276279724 v=mutation
i=dna and sexual selection
a=selection
t=migration]]> 2021-03-06 07:29:52 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276279724 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276280386 organisms better adapted to their enviorment tend to survive and produce more ]]> 2021-03-06 07:31:04 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276280386 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276280754 extreme example of genetic drift that happens when a size of a population is severly reduced. ]]> 2021-03-06 07:31:48 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276280754 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276281234 the reduced genetic diversity which results when a population is descended from a small number of colonizing ancestors. ]]> 2021-03-06 07:32:31 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276281234 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276281838 the changing of the structure of a gene, resulting in a varient form that may be transmitted to subseequent generations ]]> 2021-03-06 07:33:34 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276281838 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276282501 natural selection arising through preference by one sex for certain characteristics in individuals of the other sex. ]]> 2021-03-06 07:34:35 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276282501 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276283065 remnants of lost functions that our ancestors possessed. ]]> 2021-03-06 07:35:37 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276283065 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276283429 variation in the relative frequency of different genotypes in a smal population. owing to the chance disapperance of particular genes as individuals die or do not reproduce. ]]> 2021-03-06 07:36:18 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276283429 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276284277 area of evolutionary biology that studies evolutionary change at the level of the DNA sequence. ]]> 2021-03-06 07:37:46 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276284277 jennashaw1 https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276284756 the biogenetic law theorizes that the stages an animal embryo undergoes during development are a chronological replay of that species past evolutionary forms. ]]> 2021-03-06 07:38:37 UTC https://padlet.com/jennashaw1/hbsbrfajm6qsmr32/wish/1276284756