Plant Diversity II

	In an angiosperm, the terminal pollen sac of a stamen, where pollen grains with male gametes form.
	The most primitive lineages of flowering plants, including Amborella, water lilies, and star anise and relatives.
	The female reproductive organ of a flower, consisting of the stigma, style, and ovary.
	The mutual evolutionary influence between two different species interacting with each other and reciprocally influencing each other's adaptations.
	A gymnosperm whose reproductive structure is the cone. Includes pines, firs, redwoods, and other large trees.
	A seed leaf of an angiosperm embryo. Some species have one, others have two.
	In angiosperms, the transfer of pollen from an anther of a flower on one plant to the stigma of a flower on another plant of the same species.
	A term traditionally used to refer to flowering plants that have two embryonic seed leaves, or cotyledons. Recent molecular evidence indicates that these do not form a clade.
	A mechanism of fertilization in angiosperms, in which two sperm cells unite with two cells in the embryo sac to form the zygote and endosperm.
	The female gametophyte of angiosperms, formed from the growth and division of the megaspore into a multicellular structure with eight haploid nuclei.
	A nutrient-rich tissue formed by the union of a sperm cell with two polar nuclei during double fertilization, which provides nourishment to the developing embryo in angiosperm seeds.
	Any of a large subgroup of traditionally dicot angiosperms, including roses, peas, buttercups, sunflowers, oaks, and maples.
	A clade consisting of the vast majority of flowering plants that have two embryonic seed leaves, or cotyledons.
	The stalk of a stamen.
	In an angiosperm, a short stem with up to four sets of modified leaves, bearing structures that function in sexual reproduction.
	A mature ovary of a flower that protects dormant seeds and aids in their dispersal.
	Layer of sporophyte tissue that contributes to the structure of an ovule of a seed plant.
	A flowering plant clade that evolved later than basal angiosperms but before monocots and eudicots. Extant examples are magnolias, laurels, and black pepper plants.
	A pore in the integument(s) of an ovule.
	A clade consisting of flowering plants that have one embryonic seed leaf, or cotyledon.
	(1) In flowers, the portion of a carpel in which the egg-containing ovules develop.
	A structure that develops within the ovary of a seed plant and contains the female gametophyte.
	The thickened wall of a fruit.
	A modified leaf of a flowering plant.
	The structures that contain the male gametophyte of seed plants.
	The transfer of pollen to the part of a seed plant containing the ovules, a process that is a prerequisite for fertilization.
	Extinct seedless vascular plants that may be ancestral to seed plants.
	The base of a flower; the site of attachment of the floral organs to the stem.
	An adaptation for terrestrial plants consisting of an embryo packaged along with a store of food within a resistant coat.
	A modified leaf in angiosperms that helps enclose and protect a flower bud before it opens.
	The pollen-producing male reproductive organ of a flower, consisting of an anther and filament.
	The sticky part of a flower's carpel, which traps pollen grains.
	The stalk of a flower's carpel, with the ovary at the base and the stigma at the top.