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27 terms

AP Bio Ch.30

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seed
embryo of a living plant that is encased in a protective covering and surrounded by a food supply.
integument
Layer of sporophyte tissue that contributes to the structure of an ovule of a seed plant.
ovule
A structure that develops within the ovary of a seed plant and contains the female gametophyte.
pollen grain
Structure consisting of a few haploid cells surrounded by a thick protective wall that contains a male gametophyte of a seed plant.
pollination
the transfer of pollen from male reproductive structures to female reproductive structures in plants.
progymnosperms
An extinct seedless vascular plant that may be ancestral to seed plants.
sepals
Leaflike parts that cover and protect the flower bud.
petals
modified leaves which are usually bright in color to attract pollinators.
stamens
The pollen-producing male reproductive organ of a flower, consisting of an anther and filament.
filament
stalk that supports the anther.
anther
male reproductive part that produces pollen.
carpels
innermost part of a flower that produce the female gametophytes.
stigma
The sticky part of a flower's carpel, which traps pollen grains.
style
narrow stalk of the carpel in a flower.
ovary
in flowering plants, the lower part of a pistil that produces eggs in ovules.
fruit
A mature ovary of a flower that protects dormant seeds and aids in their dispersal.
embryo sac
The female gametophyte of angiosperms, formed from the growth and division of the megaspore into a multicellular structure with eight haploid nuclei.
cross pollination
pollen from one flower transfered to the sticky stigma of another flower.
micropyle
in the ovules of seed plants, the opening in the integuments through which the pollen tube usually enters.
double fertilization
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.
cotyledons
the stored food inside one or two seed leaves.
endosperm
In angiosperms, a nutrient-rich tissue formed by the union of a sperm with two polar nuclei during double fertilization. The endosperm provides nourishment to the developing embryo in angiosperm seeds.
monocots
A clade consisting of flowering plants that have one embyonic seed leaf, or cotyledon.
dicots
angiosperm whose seeds have two cotyledons.
eudicots
Member of a clade consisting of the vast majority of flowering plants that have two embryonic seed leaves, or cotyledons.
basal angiosperms
Member of a clade of three early-diverging lineages of flowering plants. Examples are Amborella, water lilies, and star anise and its relatives.
magnoliids
A flowering plant clade that evolved later than basal angiosperms but before monocots and eudicots. Extant examples are magnolias, laurels, and black pepper plants.