Question

Fossils of a species of bird are found in layer 3. Which layer is most likely to have organisms that lived at the same time as the bird species?

A. layer 10
B. layer 2
C. layer 5
D. layer 7​

Answer 1

C. layer 5

Step-by-step explanation:

The principle of superposition in geology states that in undisturbed rock layers, the youngest rocks are on top, and the oldest rocks are at the bottom. This means that the organisms found in deeper layers lived earlier in time compared to those found in higher layers.

Since the fossils of the bird species are found in layer 3, the organisms that lived at the same time as the bird species are most likely to be found in layers that are close to layer 3, especially those that are slightly older or slightly younger.

Therefore, the correct answer would be:

C. layer 5

This is because layer 5 is likely to contain organisms that lived around the same time as the bird species found in layer 3