Problem:
Daphnia have inducible defenses in response to chemical cues from a predatory midge including the production of thicker exoskeleton and head teeth.
Some lakes with Daphnia have the predatory midge whereas some lakes with Daphnia do not have the predator.
Develop an hypothesis about whether inducible defenses would be more likely in predator-free or predator-present populations and design a simple experiment to test this hypothesis. Please explain your experiment step by step.