evolution and extinction

extirpation

its the extinction of species where all the species die out

finding fossils is what type of record of life on Earth

incomplete record

Background extinction

natural rate of extinction

what causes extinction

changes, predation/competition, climate change

Mass extinction (geological periods)

usually 70% of the species are wiped out

how many extinction events are there

6

what era did the great dying happen in and why

the permian (volcano activity)

what extinction cause non avian dinosaurs to die

K-T (pg)

late pleistocene (ice age)

big fauna die out especially in north america like mammoth and sibertooth tiger

What animals usually die out in a mass extinction

big animals because they need more food to survive, and longer generation time

why can extinction be good

it opens up niche helping other animals to dominant and replace the past dominant animals

what was the order of animals ruling in mass extinction

synapsids, dinosaurs, mammals

adaptive radiation

animals evolve quickly to fill all types of niches (example are bird in hawaii)