8. Write yes or no to indicate whether the options apply to index fossils or not:
a)
the organisms lived during a particular, short time period
b)
the organisms lived over a long span of time
c)
found in sedimentary rock
d)
found in igneous rocks
three criteria
f)
easily recognized
o 20 S
not very many of the organisms existed
h)
found on only one or two continents