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Teaching Fish evolution and ecology

Fish evolution and ecology

The evolution of fish from hagfish to finned fish is a long and involved process. In the early evolution of fish, there was a switch to using gills to absorb oxygen instead of to filter food.

CK-12 (High School)


How did the first hagfish evolve into the multitude of fish species present today?
RST.1 - Analysis & Evidence, RST.2 - Main Ideas


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