the diagram shows fossils buried in layers of rock. which conclusion is best supported by the diagram…

the diagram shows fossils buried in layers of rock. which conclusion is best supported by the diagram? trilobites and gastropods are the youngest fossils. crinoids and gastropods have lived during the same time period. ferns have existed for a longer period of time than coral. every ammonite fossil is older than the gastropod fossils.

the diagram shows fossils buried in layers of rock. which conclusion is best supported by the diagram? trilobites and gastropods are the youngest fossils. crinoids and gastropods have lived during the same time period. ferns have existed for a longer period of time than coral. every ammonite fossil is older than the gastropod fossils.

Answer

Brief Explanations:

In rock - layer fossils, fossils in the same layer likely lived during the same time period. Crinoids and gastropods are found in the same layer. Trilobites are in a lower (older) layer, so they are not the youngest. Ferns and coral are in different layers with no clear indication of which has existed longer. Ammonite and gastropod fossils overlap in layers, so not all ammonite fossils are older.

Answer:

Crinoids and gastropods have lived during the same time period.