Question

The table below shows the fossils found in various layers of an undisturbed rock:

Fossils In Rock Layers
Layer (from top) Fossils in Layer
1 A, C
2 E
3 A, D, F
4 B
5 F, C
6 D, B

Which is most likely an index fossil?
A
B
D
E

Answer 1

[AI-generated answer — Bot GPT 3.5]

Based on the information given, the most likely index fossil would be fossil D since it appears in layers 3 and 6. An index fossil is a fossil that is found in multiple rock layers and can be used to determine the relative ages of those layers. Fossil D is found in two different layers, indicating that it may have existed for a relatively short period of time and can be used to correlate the ages of those layers.