Concept:Lamarck proposed the inheritance of acquired characteristics, but this inheritance is not supported by genetics.Explanation:Lamarck believed that traits acquired during an organism’s lifetime, like a giraffe stretching its neck, could be passed to offspring.The faulty assumption in this theory is that acquired traits are heritable.Modern genetics shows that changes acquired through use or disuse do not alter genes in reproductive cells.Answer:B. acquired traits are heritable