geologic history and evelution life Flashcards
(26 cards)
what are the longest units of time called?
eons
how mant eons have there been so far
4
when many species die in a short period of time
mass extincton
the change of a species over time
eveloution
a new type of multicellular organisms is know as (). They had ().
Cambrian explosion; hard body parts
early palezoic organisms that lived in the ocean were called
invertabrates
invertabrites had no
backbone
animals WITH backbones were called
vertabrates
some of the earliest vertabrites were
fishes
majior collison between () occured in the Paleozoic era which caused ()
moving continents; appilation mountians
fishlike organisms eveolved into
amphibians
amphibians must return to water to
mate and lay eggs
reptiles were
more evolved (lived on land)
warmer climate made
higher sea levels
the dominant geologic event of the mesozoic era was
the breakup of pangea
pangea broke up during
late triassic
pangea broke up into two continents:
Gonowananland and Laurisa
climate in the mesozoiuc ear was
warmer
crocodiles share a common ancestor with
dinosours
North America drifting west and colliding with smaller islands=
rocky Mountians formed
dinosours and croocodiles differ in their
hip structure
dinosours might relate to present day
birds
flying reptiles
pterosaurs
() eveolved during the mesozoic era but remained small
mammels
