Of the Following Organisms, the Best Index Fossils Would Be

question 19

Multiple Choice

Of the following organisms, the best index fossils would be:

• A) bacteria, because they have existed in widespread geographic areas since life first began.
• B) a specific type of trilobite that existed for only a short geologic time in widespread geographic areas.
• C) cockroaches, because they have existed in widespread geographic areas almost since the first appearance of insects.
• D) a specific type of bryzoa that existed for only a short geologic time in very limited geographic areas.

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