Extinction and Appearance
Middle School Science · Flashcards · Recall
MIDDLE SCHOOL SCIENCE · FLASHCARDS
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QUESTION
What does first appearance datum (FAD) mean in the fossil record?
QUESTION
What does last appearance datum (LAD) mean in the fossil record?
QUESTION
Which evidence best indicates a species appeared (originated) in a rock sequence?
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ANSWER
Fossils first appear in a layer and are absent in all older layers. Shows the species didn't exist before this time.
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