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Most of us are used to thinking that the evolution of living organisms takes millions of years. But in the case of cockroaches, scientists say the resilient pests have a developed a fast-forward mechanism to save their own exoskeleton.
In a newly published study in the journal , a group of researchers conclude that cockroaches have evolved to avoid sweet-tasting poisons by making a subtle change in their body chemistry that makes the bait taste bitter to them.
Cockroaches don’t have taste buds, but instead taste hairs.
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James' World 2 
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