Shared Flashcard Set

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Plants
Vocabulary
15
Science
7th Grade
05/21/2009

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Cards

Term
cuticle
Definition
waxy, protective layer that covers the stems, leaves, and flowers of many plants and helps prevent water lost
Term
cellulose
Definition
chemical compound made out of sugar; forms tangled fibers in the cell walls of many plants and provides structure and support
Term
vascular plants
Definition
plant with tubelike structures that move minerals, water, and other substances throughout the plant
Term
nonvascular plants
Definition
plant that absorbs water and other substances directly through its cell walls instead of through tubelike structures
Term
rhizoid
Definition
threadlike structures that anchor nonvascular plants to the ground
Term
pioneer species
Definition
first organisms to grow in new or disturbed areas; break down rock and build up decaying plant material so that other plants can grow
Term
stomata
Definition
tiny openings in a plant's epidermis through which carbon dioxide, water vapor, and oxygen enter and exit
Term
guard cell
Definition
pairs of cells that surround stomata and control their openings and closing
Term
xylem
Definition
vascular tissue that forms hollow vessels that transport substances, other than sugar, throughout the plant
Term
phloem
Definition
vascular tissue that forms tubes that transport dissolved sugar throughout a plant
Term
cambium
Definition
vascular tissue that produces xylem and phloem cells as a plant grows
Term
gymnosperm
Definition
vascular plants that do not flower, generally have needlelike or scalelike leaves, and produce seeds that are not protected by fruit
Term
angiosperm
Definition
flowering vascular plants that produce fruits containing one or more seeds; monocots and dicots
Term
monocot
Definition
angiosperm with one cotyledon inside its seed, flower parts in multiples of three, and vascular tissues in bundles scattered throughout the stem.
Term
dicot
Definition
angiosperm with two cotyledons inside its seed, flower parts in multiples of four or five, and vascular bundles in rings
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