Question
Drag and drop the labels to fill in the missing parts below based on the index fossil diagram. The square represents the youngest fossil The square is found in all rock layers, indicating little change over time.The square lived in one rock layer type only. If the these specific rock types can be dated by geologists, then paleontologists can square the ammonites age . The square fossil is found in the oldest rock layer. It does not appear in any rock layers above , leading to the conclusion that this organism became square fern coral plentiful ammonite gastropod trilobite extinct estimate
Answer
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Ylva
Master · Tutor for 5 years
Answer
The *ammonite* represents the youngest fossil. The *coral* is found in all rock layers, indicating little change over time. The *trilobite* lived in one rock layer type only. If these specific rock types can be dated by geologists, then paleontologists can *estimate* the ammonites' age. The *trilobite* fossil is found in the oldest rock layer. It does not appear in any rock layers above, leading to the conclusion that this organism became *extinct*.
Explanation
The question requires identifying fossils from an index fossil diagram and understanding their distribution across rock layers. Here's what each term likely refers to:1. The youngest fossil would be found in the uppermost rock layer, which means it appeared most recently.2. The one found in all rock layers indicates a fossil that showed little evolutionary change over time.3. A fossil found in only one rock layer type suggests it was present for a relatively short period of geological time.4. If the specific rock types where these fossils are found can be dated, paleontologists could estimate the age of the ammonites.5. The oldest fossil would be found in the lowest rock layer and does not appear in any subsequent layers, suggesting it became extinct.