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29 Cards in this Set
- Front
- Back
SEED
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an adaptation of some terrestrial plants consisting of an embryo packaged along with a store of food within a protective coat
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INTEGUMENT
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layer of sporophyte tissue that contributes to the structure of an ovule of a seed plant
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OVULE
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a structure that develops within the ovary of a seed plant and contains the female gametophyte
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POLLEN GRAIN
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in seed plants, a structure consisting of the male gametophyte enclosed within a pollen wall
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POLLINATION
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the transfer of pollen to the part of a seed palnt containing the ovules, a process required for fertilization
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PROGYMNOSPERM
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an extinct seedless vascular plant that may be ancestral to seed plants
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CONIFER
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member of the largest gymnosperm phylum; most conifers are cone-bearing trees, such as pines and firs
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SEPAL
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a modified leaf in angiosperms that helps enclose and protect a flower bud before it opens
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FLOWER
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in an angiosperm, a short stem with up to four sets of modified leaves, bearing structures that function in sexual reproduction
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PETAL
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a modified leaf of a flowering plant, petals are often colorful parts of a flower that advertise it to insects and other pollinators
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STAMEN
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the pollen-producing reproductive organ of a flower, consisting of an anther and a filament
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FILAMENT
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in an angiosperm, the stalk portion of the stamen, the pollen-producing reproductive organ of a flower
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ANTHER
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in an angiosperm, the terminal pollen sac of a stamen, where pollen grains containing sperm-producing male gametophytes form
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CARPEL
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the ovule-producing reproductive organ of a flower, consisting of te stigma, style and ovary
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STIGMA
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the sticky part of a flower's carpel, which traps pollen grains
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STYLE
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the stalk of a flower's carpel, with the ovary at the base and the stigma at the top
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OVARY
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in flowers, the portion of a carpel in which the egg-containing ovules develop
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FRUIT
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a mature ovary of a flower; the fruit protects dormant seeds and often aids in their dispersal
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EMBRYO SAC
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the female gametophyte of angiosperms, formed from the growth and division of the megaspore into a multicellular structure taht typically has eight haploid nuclei
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CROSS-POLLINATION
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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
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MICROPYLE
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a pore in the integuments of an ovule
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DOUBLE FERTILIZATION
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a mechanism of fertilization in angiosperms in which two sperm cells unite with two cells in the female gametophyte to form the zygote and endosperm
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COTYLEDON
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a seed leaf of an angiosperm embryo; some species have one cotyledon and others have two
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ENDOSPERM
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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
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MONOCOT
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member of the clade consisting of flowering plants that have one embryonic seed leaf or cotyledon
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DICOT
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a term traditionally used to refer to flowering plants that have two embryonic seed leaves or cotyledons
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EUDICOT
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member of a clade consisting of the vast majority of flowering plants that have two embryonic seed leaves or cotyledons
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BASAL ANGIOSPERM
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member of a clade of three early-diverging lineages of flowering plants
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MAGNOLIID
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member of the angiosperm clade most closely related to eudicots
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