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19 Cards in this Set
- Front
- Back
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Where is pollen released from?
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Anther
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How many microsporangia are there per sporophyll?
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2-15
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What does the tapetum do?
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It helps in pollenwall formation, transportation of nutrients to inner side of anther, synthesis of callase enzyme for separation of microspore tetrads
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What is a Gymnosperm? what is an angiosperm?
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Gymnosperm is a group of spermatophyte seed-bearing plants with ovules on scales, which are usually arranged in cone-like structures.
Angiosperms is a plant having its seeds enclosed in an ovary; a flowering plant |
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What is a vascular tissue? what kind of cells? what non-seed plants have vascular tissue?
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The supportive and conductive tissue in plants, consisting of xylem and phloem.
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What is a seed? (three components)
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A seed consists of an embryo and its food supply, surrounded by a protective coat?
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Define Ovulate cone
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Female cone, megasporocytes undergo meiosis and produce haploid megaspores inside the ovule
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Define Microspore cone
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The male cone, devolpes into polen grain containing a male gametophyte.
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Define nucellus
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the central cellular mass of the body of the ovule, containing the embryo sac
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Define integuments
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A layer of sporophyte tissues that protects the megasporangium.
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Define seed coat
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multicellular layer of tissues that provides protection to the embryo
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Define gametophyte
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the sexual form of a plant in the alternation of generations
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Define microspore
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any of the spores in heterosporousplants that give rise to male gametophytes and are generally smaller than the megaspore
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Define sporophyte
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the form of a plant in the alternation of generations that produces asexual spores.
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Define microsporangium
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a sporangium containing microspores
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Define megaspore
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a spore in heterosporous plants that givesrise to female gametophytes and is generally larger than a microspore
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Define ovule
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the plant part that contains the embryo sac
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What are pollen grains
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in seed plants, a structure consisting of the male gametophyte enclosed within a pollen wall
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Where do you find the gametophyte on a gymnosperm?
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inside the cones
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