For 10 points, name these modified leaves that surround the reproductive organs of a flower.
In the ABC model, B genes coupled with A genes produce these structures. Symmetry of these structures is either actinomorphic or zygomorphic. Most dicots have four or five of these structures, while monocots typically have three or six of them. Smaller structures called sepals lie beneath these structures, the collection of which is known as the corolla. For 10 points, name these modified leaves that surround the reproductive organs of a flower.
In the ABC model, B genes coupled with A genes produce these structures.
{petals} [prompt on {leaf} or word forms {thereof} ; accept {flowers} before " {four} "]