Evidence for the fifth sense of smell,was lacking until recently. Scientists now think that they have found evidence for a sense of smell in the dodder plant. The dodder is an unusual plant because it does not grow roots and,in fact,cannot even produce energy for itself. Instead, it attaches itself to other plants and takes food from them. Scientists now think that they have found evidence for a sense of smell in the doder plant. The dodder is an unusual plant because it does not grow roots and, in fact,cannot even produce energy for itself. Instead,it attaches itself to other plants and takes food from them. Scientists did not know how dodder plants found their prey,but now the evidence suggests that they "smell" their prey out. Dodder plants are able to sense chemicals in the air that other plants release. Therefore, when a tomato plant dodder plant favorite prey-is nearby,the dodder plant "smells"it. Then the dooder plant moves toward the tomato plant and attaches to it