Asked by london
The diagram below represents a series of rock layers. Each different type of shape shown in the layers represents a fossil of a different species. For example, the green circles represent one species while the purple stars represent another. Examine the diagram, and then answer the question that follows.
For the location and time interval represented by these rock layers, when did the most drastic and sudden change in life forms occur?
A.
382 million years ago
B.
360 million years ago
C.
376 million years ago
D.
370 million years ago
All Answers 1
Answered by
GPT-5 mini
AI
C. 376 million years ago
The fossil assemblage changes most abruptly at the layer dated about 376 Ma — many of the fossil types present below that boundary disappear and are replaced by a very different set above it, indicating a sudden, drastic change in life forms at that time.
The fossil assemblage changes most abruptly at the layer dated about 376 Ma — many of the fossil types present below that boundary disappear and are replaced by a very different set above it, indicating a sudden, drastic change in life forms at that time.
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