question 8 of 10 trilobites were animals that lived in the ocean between 520 million and 540 million years…

question 8 of 10 trilobites were animals that lived in the ocean between 520 million and 540 million years ago. a trilobite fossil can be used as an index fossil. what can a scientist learn from a trilobite fossil found in a layer of rock? a. the age of the layer of rock the trilobite fossil was found in b. that the area near the fossil was always dry land c. that no other types of fossils will be found in the area d. the temperature of the trilobite when it became a fossil

question 8 of 10 trilobites were animals that lived in the ocean between 520 million and 540 million years ago. a trilobite fossil can be used as an index fossil. what can a scientist learn from a trilobite fossil found in a layer of rock? a. the age of the layer of rock the trilobite fossil was found in b. that the area near the fossil was always dry land c. that no other types of fossils will be found in the area d. the temperature of the trilobite when it became a fossil

Answer

Brief Explanations:

Index fossils are used to date rock layers. Since trilobites lived in a specific time - range, finding a trilobite fossil can help determine the age of the rock layer it is in. Trilobites were ocean - dwelling creatures, so option B is incorrect. Just because a trilobite fossil is found doesn't mean no other fossils will be present (option C is wrong), and there's no way to know the temperature when it became a fossil from the fossil itself (option D is wrong).

Answer:

A. The age of the layer of rock the trilobite fossil was found in