Multiple choice Apocarpous pistil refers to gynoecium having free carpels gynoecium having united carpels gynoecium not having fertile carpels gynoecium having three carpels Reveal answer Fill a bubble to check yourself A Correct answer Explanation Apocarpous pistil refers to a gynoecium (female reproductive structure) with free, separate carpels that are not fused together. Syncarpous pistils have united carpels. The number of carpels varies by species.