The Fossil Record of Cnidaria Is

question 31

Multiple Choice

The fossil record of Cnidaria is

• A)about the same as for other primitive animals,beginning in the Cambrian.
• B)relatively sparse since their bodies are so soft that they leave no skeleton to fossilize.
• C)one of the longest records,with fossils going back over 700 million years.
• D)sporadic since the marine environment is not a good substrate to preserve fossils.
• E)very recent since most of them have symbiotic relationships with advanced animals such as clown fish.

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