A turtle that can hold its breath under water for 1 minute eventually produces offspring. these turtles will be able to hold their breath slightly longer than their parent. the future generations of these turtles will continue to be able to hold their breath for even longer durations then their parents if all turtles across the generations acquire the ability to take longer breaths.-if lamarcking evolution were true (although we know that its implied mechanism is largely not correct), parents would have to acquire a trait and pass on that trait to their offspring. over long amounts of time and through many generations, the population of individuals who inherited those acquired characteristics would eventually look different than their ancestors (note that the time length is critical - the answer with giraffes had only a single generation resulting in a massive change between parent and offspring)
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