Mapa mental
Fossils
Mind map: fossils
Contenido del mapa
Fossils
shows
- succession of organisms
- extinct organisms were different from organisms that exist today
- as new species arise, others become extinct
problems
- incomplete
- organism had to die at right place and time for burial conditions to favor fossilization
- rock layer containing fossil had to escape geologic processes that destroy or severely distort rocks
- chance that someone will find a fossil is remote
- fossil record is slanted in favor of species that
- have existed for a long time
- were abundant
- widespread
- had hard shells or skeletons