Now I know that structures in a simple nervous system differ from those in a complex nervous system in that they have a unit that isn't basic, but in their arrangement. In higher nervous systems there are not interneurons concentrated in the main nervous system. (brain, spinal, and cord.) They meditate the impulses between afferent and efferent neurons.
Mealybugs will commonly leave a white residue on a plant's leaves that resembles cotton. You will find this residue mostly on the stems and leaves. ... You may also find that the plant has a sticky residue on it. This is honeydew and is secreted by the mealybugs.
