Quickie Quiz 10

What are the essential plant functions/features to which Nitrogen contributes?
What are the essential plant functions/features to which Phosphorus contributes?
What are the essential plant functions/features to which Potassium contributes?
Describe the differences between a herbaceous stem and a woody stem.
Draw dicot and monocot stem complete with vascular elements (xylem and phloem) being clear in the diagrams to display the differences between the two types of stems.