Why did people introduce the bullfrogs into the non-native areas?

According to biologists, bullfrogs began their leap around the world in 1898, when they were imported to California to satiate a consumer appetite for frog legs. Similar importations spread the croakers to Asia, Europe, and South America.

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c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."