Which Statement Most Closely Represents the Diversity of Animal Patterns

question 23

Multiple Choice

Which statement most closely represents the diversity of animal patterns resulting from the Cambrian time period?

• A)The Cambrian saw the first animal ancestor;all animal architecture dates back to these fossils.
• B)About 33 phyla evolved by the end of the Cambrian and there are now perhaps 100 phyla that have radiated from them.
• C)About 100 phyla evolved by the end of the Cambrian and there are now about 33 surviving animal phyla.
• D)Through the Cambrian,only non-animal ancestors existed,but after that time nearly 100 phyla evolved.

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