Living organisms are composed of millions of organic compounds, each having a unique structure. what element is responsible for this huge diversity of molecules? describe the diversity of structures that can be formed and the properties of this element that allow this diversity of form to occur

The answer is carbon.

The reason this element gives so much diversity is due to its valency of +4. This means it can bond with many elements in different ways to form different compounds. Carbon can also bond with other carbon atoms in many different ways (from linear chains, branched chains to rings). It is due to this versatility that carbon is the central elements of organic life. The different organic molecules that carbon is the central atom is DNA, carbohydrates, proteins, lipids, and etcetera.  

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.