Question

select the qualities of an index fossil *
4 points
□ lived for a very long time in geologic terms
□ lived for a relatively short time in geologic terms
□ is limited to specific areas is therefore more likely to provide accurate dating of rock layers
□ is found in a widespread geographic area. it can then be used to date sedimentary layers over very long distances.
□ found in high numbers. this makes them more likely to be found.
□ found in low numbers. this allows specific dating of a particular time period.
□ easily recognizable

Explanation:

Index fossils are used for relative dating of rock layers. Key qualities include: short geologic existence (to narrow time periods), widespread geographic distribution (to correlate layers across regions), abundance (easy to find), and distinctiveness (easy to identify).

Answer:

Lived for a relatively short time in geologic terms
is found in a widespread geographic area. It can then be used to date sedimentary layers over very long distances.
Found in high numbers. this makes them more likely to be found.
Easily recognizable