| A | B |
|---|
| anther | where pollen grains with male gametes form |
| basal angiosperms | most primitive lineages of flowering plants |
| carpel | female reproductive organ of a flower |
| coevolution | mutual evolutionary influence between two different species interacting with each other |
| conifer | gymnosperm whose reproductive structure is the cone |
| cotyledon | seed leaf of an angiosperm embryo |
| cross-pollination | transfer of pollen from an anther of one plant to the stigma of another plant |
| dicots | have two embryonic seed leaves |
| double fertilization | two sperm cells unite with two cells in the embryo sac to form the zygote and endosperm |
| embryo sac | growth and division of the megaspore into a multicellular structure with eight haploid nuclei |
| endosperm | nutrient-rich tissue formed by the union of a sperm cell with two polar nuclei |
| eudicot | large subgroup of traditionally dicot angiosperms |
| eudicots | clade consisting of the vast majority of flowering plants that have two embryonic seed leaves |
| filament | stalk of a stamen |
| flower | modified leaves |
| fruit | mature ovary of a flower that protects dormant seeds and aids in their dispersal |
| integument | contributes to the structure of an ovule of a seed plant |
| magnoliids | clade that evolved later than basal angiosperms but before monocots and eudicots |
| micropyle | pore in the integument(s) of an ovule |
| monocots | clade consisting of flowering plants that have one embryonic seed leaf |
| ovary | portion of a carpel in which the egg-containing ovules develop |
| ovule | contains the female gametophyte |
| pericarp | thickened wall of a fruit |
| petal | colorful parts of a flower that advertise it to insects and other pollinators |
| pollen grains | contain the male gametophyte of seed plants |
| pollination | transfer of pollen to the part of a seed plant containing the ovules |
| progymnosperms | extinct seedless vascular plants that may be ancestral to seed plants |
| receptacle | site of attachment of the floral organs to the stem |
| seed | embryo packaged along with a store of food within a resistant coat |
| sepal | helps enclose and protect a flower bud before it opens |
| stamen | pollen-producing male reproductive organ of a flower |
| stigma | sticky part of a flower’s carpel |
| style | stalk of a flower’s carpel |
