Figure 11.16 depicts changes in the number of genera of cephalopods and fishes through a segment of geologic time. From the graph, suggest a possible ypothesis for the extinction of ammonites and reduction of nautiloids at the end of the Cretaceous. (Cephalopoda) Ammonites Increasing generic diversity Teleosts (progressive bony fish) Nautiloids Belemnites Cretaceous Paleocene Eocene

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