Monocots generally form shorter plants than many (woody) eudicots, but they can rapidly grow when grazed due to their intercalary meristems. This means that monocots can thrive when herbivores are present while eudicots suffer more from herbivory. When herbivores are removed, the monocots are overgrown/shaded by the eudicots which can then grow tall.
Work Step by Step
Review the information in the chapter about the relative growth forms of monocots and eudicots and use your imagination to see the differential effects of herbivores on these two kinds of plants.