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Fossils
- shows
- succession of organisms
- extinct organisms were different
from organisms that exist today
- as new species arise, others
become extinct
- succession of organisms
- 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
- have existed for a long time
- incomplete
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