What distinguishes simple flowers from compound flowers?

• A. Simple Flowers Have A Single Flower Per Stalk; Compound Flowers Have More Than One Per Stalk
• B. Simple Flowers Have More Than One Per Stalk; Compound Have A Single
• C. Simple Flowers Have Petals; Compound Flowers Do Not
• D. Simple Flowers Are Colorful; Compound Flowers Are Colorless

Answer: (A)

The key idea is how flowers are organized on the plant—whether you’re looking at a single bloom or a cluster of blooms that forms a single unit. In a simple flower, there is one floral structure at the end of a stalk. In a compound flower, what looks like one flower is actually a head or inflorescence composed of many small flowers, all borne on the same stalk. A good way to see this is to compare a rose (a single flower on its stem) with a sunflower or daisy head (a composite made of thousands of tiny flowers arranged together). Petal count or color doesn’t define the distinction; it’s about the number of flowers arranged on the stalk.