Question

What is an index fossil?(1 point)
Responses

a fossil of a footprint or other trace made by an organism

a fossil in igneous rock

a fossil of an organism from a species that did not live for very long

a fossil left during a mass extinction event

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What is an index fossil?(1 point) Responses.. a fossil left during a mass extinction event a fos... What is an index fossil?(1 point) Responses a fossil of a footprint or other trace made by an or...