Assume that the rock is sedimentary rock and that the layer have not been disturbed by earthquakes or any other event.

What kinds of animals and plants would you expect to find at the top layer of rock?

At the top layer of sedimentary rock, you would likely find animals and plants that are adapted to terrestrial environments. This could include small mammals, birds, insects, and plants such as grasses, shrubs, and trees. Additionally, you may find evidence of human activity depending on the location of the rock layer. The specific types of animals and plants present would depend on the local climate, geology, and ecological conditions at the time the rock layer formed.