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39 Cards in this Set
- Front
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a microscopic pore surrounded by guard cells in the epidermis of leaves and stems that allows gas exchange
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stomata
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a hard material embedded in the cellulose matrix of vascular plant cell walls that function as an important adaptation for support in terrestrial species
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lignin
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a waxy covering on the surface of stems that acts as an adaption to prevent desiccation
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cuticle
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multicellular haploid form in organisms
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gametopohyte
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multicellular diploid form in organisms
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sporophyte
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a vascular plant that bears naked seeds
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gymnosperm
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a flowering plant which forms seeds in a protective chamber
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angiosperm
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tube shaped nonliving portion of the vascular system in plants that carries water and minerals
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xylem
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living cells arranged in tubes to transport sugar and other organic nutrients
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phloem
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referring to pants in which a single type of spore develops into a bisexual gametophyte having both male and female sex organs
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homosporous
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referring to plants in which the sporophyte produces two kinds of spores that develop into unisexual gametophytes either female or male
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heterosporous
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One of the two types of haploid spores produced by a heterosporous plant. Develop into female gametophytes and are usually larger than microspores.
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megaspore
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he smaller of the two kinds of spores characteristically produced by seed plants and some fern allies, developing into a male gametophyte
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microspore
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water conducting and supportive element of xylem composed of long thin cells
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tracheids
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specialized short wide cell in angiosperms arranged end to end
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vessel element
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chain of living cells that form sieve tubes in phloem
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sieve tubes
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the one or two seed leaves of an angiosperm embryo
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cotyledons
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plant tissue that remains embryonic as long as the plant lives allowing for unlimited growth
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meristem
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specialized epidermal plant cell that forms the boundaries of stomata
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guard cell
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growth initiated by the apical meristems of a plant root or shoot
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primary growth
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the increase in girth of the stems and roots of many plants
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secondary growth
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primary meristem of roots and shoots that form the vascular tissue
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procambium
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physical property that predicts the direction in which water will flow by solute concentrations and pressure
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water potential
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force directed against a cell wall after the influx of water and swelling of walled cell wall due to osmosis
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turgor pressure
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movement of water due to a difference in pressure between two locations
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bulk flow
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binding together of like molecules often by hydrogen bonds
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cohesion
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the property of sticking together (as of glue and wood) or the joining of surfaces of different composition; "the mutual adhesiveness of cells"; "a heated hydraulic press was required for adhesion"
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adhesion
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water impermeable ring of wax around epodermal cells in plants that blocks flow of water and solutes by cell walls
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Casparian strip
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growth of a plant shoot toward or away from light
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phototropism
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growth of a plant shoot toward or away from gravity
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gravitoprism
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a physiological response to day length, such as flowering in plants
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photoperiodism
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a class of plant hormones that have a variety of effects on the plant host
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auxins
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plant hormones that retard aging and act with auxins to stimulate cell division
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cytokinins
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plant hormones that stimulate growth in stems and leaves
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gibberellin
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plant hormone that acts to inhibit growth and help it through stressful conditions
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abscisic acid
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only gaseous plant plant hormone responsible for fruit ripening
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ethylene
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an inclusion, as a starch grain, that by a change in position within the cells of an organ or part is assumed to cause a corresponding change in position of the organ or part.
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statolith
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a physiological cycle of 24 hours, present in all eukaryotic organisms
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circadian rhythm
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cells that make up stomata
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guard cell
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