What is the relationship between undisturbed sedimentary rock layers and fossils? Fossils only can be found in the youngest sedimentary rock layers.
Older fossils are found in deeper layers of sedimentary rock.
More recent fossils are found in the deepest of the rock layers.

Older fossils are found in deeper layers of sedimentary rock.

Explanation:

The relationship between undisturbed sedimentary rock layers and fossils is that older fossils are found in deeper layers of sedimentary rocks.

This is one of the premise of the law of superposition and principle of fossil and fauna succession.

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?