Describe how a plants systems work together to protects the plant from parasites and disease (10 points)

Plants defend against herbivores with mechanical wounding, barriers, secondary metabolites, and attraction of parasitoids.

The league of nations was found in 1919 to keep peace after world war l.but it failed to prevent world war ll in 1939,so in 1945 the nations of the world set up a new organization,the united state (un).since then, the un has encouraged international cooperation and worked to resolve conflict