Question
What is an index fossil?(1 point)
Responses
a fossil of a footprint or other trace made by an organism
a fossil of a footprint or other trace made by an organism
a fossil left during a mass extinction event
a fossil left during a mass extinction event
a fossil of an organism from a species that did not live for very long
a fossil of an organism from a species that did not live for very long
a fossil in igneous rock
Responses
a fossil of a footprint or other trace made by an organism
a fossil of a footprint or other trace made by an organism
a fossil left during a mass extinction event
a fossil left during a mass extinction event
a fossil of an organism from a species that did not live for very long
a fossil of an organism from a species that did not live for very long
a fossil in igneous rock
Answers
GPT-4o mini
An index fossil is **a fossil of an organism from a species that did not live for very long**. This type of fossil is used to help date the layers of rock in which they are found and can indicate a specific time period in Earth's history.