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| a modified leaf in angiosperms that helps enclose and protect a flower bud before it opens. |
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| a modified leaf of a flowering plant. ___ are the often colorful parts of a flower that advertise it to insects and other pollinators. |
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| the pollen-producing reproductive organ of a flower, consisting of an anther and a filament |
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Definition
| the ovule-producing reproductive organ of a flower, consisting of the stigma, style, and ovary |
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| the base of a flower; the part of the stem that is the site of attachment of the floral organs |
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| the union of haploid gametes to produce a diploid zygote |
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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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| In flowers, the portion of a carpel in which the egg-containing ovules develop. |
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| the stalk of a flower's carpel, with the ovary at the base sand the stigma at the top |
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| the sticky part of a flower's carpel, which traps pollen grains |
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Definition
| a structure that develops within the ovary of a seed plant and contains the female gametophyte |
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Definition
| a single carpel or a group of fused carpels |
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Definition
| a flower that has all four basic floral organs: sepals, petals, stamens, and carpels |
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Definition
| a flower in which one or more of the four basic floral organs (sepals, petals, stamens, or carpels) are either absent or nonfunctional. |
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Definition
| a group of flowers tightly clustered together |
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Definition
| a spore from a hetersporous plant species that develops into a male gametophyte |
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Definition
| in seed plants, a structure consisting of the male gametophyte enclosed within a pollen wall. |
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Definition
| a tube formed after germination of the pollen grain that functions in the delivery of sperm to the ovule |
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Definition
| the female gametophyte of angiosperms, formed from the growth and division of the megaspore into a multicellular structure that typically has eight haploid nuclei. |
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Definition
| a spore from a heterosporous plant species that develops into a female gametophyte |
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Definition
| the transfer of pollen tot he part of a seed plant containing the ovules, a process required for fertilization. |
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Definition
| in angiosperms, a nutrient-rich tissue formed by the union of a sperm with two polar nuclei during double fertilization. the ___ provides nourishment to the developing embryo in angiosperm seeds. |
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Definition
| a mechanism of fertilization in angiosperms in which two sperm cells unite with two cells in the female gametophyte (embryo sac) to form the zygote and endosperm |
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Definition
| a condition typified by extremely low metabolic rate and a suspension of grwoth and development. |
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Definition
| a tough outer covering of a seed, formed from the outer coat of an ovule. In a flowering plant, the ___ encloses and protects the embryo and endosperm |
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Definition
| in an angiosperm embryo, the embryonic axis below the point of attachment of the cotyledon(s) and above the radicle. |
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Definition
| In an angiosperm embryo, the embryonic axis above the point of attachment of the cotyledon(s) and below the first pair of miniature leaves. |
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Definition
| the covering of the young shoot of the embryo of a grass seed. |
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Definition
| the covering of the young root of the embryo of a grass seed. |
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Definition
| a mature ovary of a flower. the ___ protects dormant seeds and often aids in their dispersal. |
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Definition
| a fruit derived from a single carpel or several fused carpels |
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Definition
| a fruit derived from a single flower that has more than one carpel |
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Definition
| a fruit derived from an inflorescence, a group of flowers tightly clustered together |
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Definition
| a fruit, or assemblage of fruits, in which the fleshy parts are derived largely or entirely from tissues other than the ovary. |
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Definition
| the generation of offspring from a single parent that occurs without the fustion of gametes (by budding, division of the entire organism into two or more parts). In most cases, the offspring are genetically identical to the parent. |
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Definition
| a means of asexual reproduction whereby a single parent breaks into parts that regenerate into whole new individuals |
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Definition
| the ability of some plant species to reproduce asexually through seeds without fertilization by a male gamete. |
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Definition
| cloning of plants by asexual means |
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| In plant biology, having the male and female |
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Definition
| the ability of a seed plant to reject its own pollen and sometimes the pollen of closely related individuals |
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Definition
| a mass of dividing, undifferentiated cells at the cut end of a shoot |
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Definition
| the plant that provides the root system when making a graft |
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Definition
| the twig grafted onto the stock when making a graft |
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Definition
| a fuel produced from dry organic matter or combustible oils produced by palnts |
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Definition
| the addition of mineral nutrients to the soil |
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