such as the Pit-Klamath Brook Lamprey, that is land-locked, meaning that they do not migrate to the sea. These forms do not have a predatory adult form, but instead go rapidly from a ammocoete larvae ...

But here, another pesticide called TFM was painstakingly developed and, when applied to tributaries where the lamprey lingered, started wiping out the creatures and, so far as folks know ...

More flexible than expected: changes in nutrition led to a complete conversion to predatory behavior. Genetic memory: microRNA molecules are involved in evolutionary adaptation and behavioral change.