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When sharks swam the Great Plains

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If you’ve ever been to, lived in, or even flown over the central swath of North America, then you’ve seen the remnants of what was a uniquely fascinating environment. Scientists call it the Western Interior Seaway, and at its greatest extent, it ran from the Caribbean Sea to the Canadian Arctic.

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What evidence suggests that niche partitioning occurred among the predators of the Western Interior Seaway?

a

The presence of different types of teeth adapted for various diets.

b

The migration patterns of these predators across the seaway.

c

The uniform size of all predators, indicating a shared prey source.

d

The absence of any predatory interactions in the fossil record.

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