Once exposed to an antibiotic drug, bacteria will develop a resistance in order to survive and then pass the resistance onto subsequent generations. This is an example of Lamark's idea of the inheritance of acquired characteristics.

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Lamarck's theory of inheritance of acquired characteristics suggests that traits developed during an organism's life can be passed on to its offspring. The concept of bacteria developing resistance to antibiotics and passing this resistance on fits with Lamarck's idea, even though the actual mechanism of bacterial resistance and its inheritance is more accurately explained by modern genetics and evolutionary theory.

Once Exposed to an Antibiotic Drug, Bacteria Will Develop a Resistance