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what makes a fossil an index fossil?
a. The fossil comes from an animal that did not evolve.
b. The fossil does not contain any traces of DNA.
c. The fossil cannot be dated using radioactive dating.
d. The fossil was formed only during a certain short time period.

Respuesta :

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.Answer:

D) The fossil was formed only during a certain short time period.

Explanation:

  • Index fossils are any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment
  • Fossils can tell you a lot about the rock they're found in, and index fossils are used to used to define periods of geologic time

Fossils are the impression of the dead remains of plants and animals. A fossil is called an index fossil when it was formed only during a certain short period. Thus, option d is correct.

What is an index fossil?

An index fossil remains and a cast of the animals and plants embedded in the rock layers for a particular period in geological time. They are abundant and widely distributed over geographical places. They can be used to determine similar time in various geographic locations.

Therefore, the index fossils were formed only during a certain short time period.

Learn more about index fossils here:

https://brainly.com/question/15525289

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