DENDROLOGY

Detailed explanation-1: -Unlike gymnosperms, angiosperms have evolved specialized structures that are used in reproduction. Because the ovules are protected within the ovary, angiosperms rely upon pollination to facilitate reproduction. Containing both female and male reproductive organs, angiosperms represent the only plants with carpels.

Detailed explanation-2: -A complete flower contains sepals, petals, pistils, and stamens. An incomplete flower is missing one of those parts. Imperfect flowers are always incomplete, but incomplete flowers may or may not be imperfect. Flowers are important in making seeds.

Detailed explanation-3: -A complete flower is a plant biology term that refers to a flower that is made up of four parts: sepals, petals, pistils, and stamens. If any of these four pieces, which are essential in the formation of a flower, is absent, the flower is referred to as an incomplete flower.