Question

30. Zangerl and Rutledge (1996) compared the level of defensive chemicals in different parts of wild Pursnip plants before and after simulated herbivory. The researchers simulated the damage to plants from herbivores by pushing needles into the plant part. The figure below shows the mean dry weight of xanthonin (the defensive chemical) before (control) and after damage. The asterisks (**) indicate thut there was a significant change in the weight of xanthonins before and after damage. Based on these results, which stalement is FALSE? 5.61 5.06 Control Damaged Xanthonin Mean Dry Weight ( woon- 0.61 0.7? 0.02 0.035 Fruit Roots Leaves Part of plant a. The fruit of the plant produce a higher level of xanthonins than leaves and roots. b. The production of xanthonins in the fruit is a constitutive plant defense. c. The reproductive part of the plant is the most defended. d. The production of xanthonins in the leaves is an induced defense. END OF TEST. Be sure that you have entered the test code on the computer answer sheet. The test code is 33.