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liq [111]
3 years ago
9

These are segments of the columnar stem of what fossil echinoderm animal? Each disk is a single crystal of calcium carbonate, an

d in life the animal's living tissue threaded through the hole passing through the stack of disks.
Geography
1 answer:
34kurt3 years ago
7 0

Answer:

Crinoids.

Explanation:

These are segments of crinoids.

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