1. a diagram of seven rock layers is shown. the diagram represents a section of earth that a paleontologist…

1. a diagram of seven rock layers is shown. the diagram represents a section of earth that a paleontologist, a scientist who studies fossils, has been working with for years. which statement correctly describes this diagram? a. layer w contains fossils of organisms that existed on earth after the organisms found in layers u and r. b. layer u contains fossils of organisms that are older than the organisms found in layer r. c. layers w and u contain fossils that are animal species. d. layers r and w contain fossils that are both types of plant species.

1. a diagram of seven rock layers is shown. the diagram represents a section of earth that a paleontologist, a scientist who studies fossils, has been working with for years. which statement correctly describes this diagram? a. layer w contains fossils of organisms that existed on earth after the organisms found in layers u and r. b. layer u contains fossils of organisms that are older than the organisms found in layer r. c. layers w and u contain fossils that are animal species. d. layers r and w contain fossils that are both types of plant species.

Answer

Explanation:

Step1: Recall the principle of superposition

In undisturbed rock - layers, the oldest layers are at the bottom and the youngest are at the top.

Step2: Analyze option A

Layer W is above layer U. According to the principle of superposition, the organisms in layer W existed after the organisms in layer U. This option is correct.

Step3: Analyze option B

Layer U is above layer R, so the fossils in layer U are younger than those in layer R, not older. This option is incorrect.

Step4: Analyze option C

There is no information in the question to suggest that layers W and U contain only animal - species fossils. This option is not supported.

Step5: Analyze option D

There is no information in the question to suggest that layers R and W contain only plant - species fossils. This option is not supported.

Answer:

A. Layer W contains fossils of organisms that existed on Earth after the organisms found in layers U and R.