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48 Cards in this Set

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Parenchyma
Spherical cells with thin, flexible walls
make food and storage
Collenchyma
Long cells with unevenly thickened walls
Provide for support
Scelerenchyma
Very thick, rigid cells
Fibers
Long strands
Stone Cells
Circular clusters
Dermal Tissue*
Flattened parenchyma that covers entire plant (skin)
Stomata*
Opening in leaf cuticle
Guard Cells
Control opening and closing of somata
Trichomes
Hair like projections to help reduce evaporation
Vascular Tissue*
Transport system in plant
Xylem*
Tubular cells that transport H2O from roots up
Tracheids
Tapered tubes
Vessel Elements
Wide and short with openings at both ends
Phloem*
Living tube cells that transport sugar from leaves down
Sieve tube members
Have no ribosomes or nucleus
Companion Cells
Nucleated cells that control sieve tube members
Grand Tissues*
All other tissues
photosynthesis, storage, support
Meristematic Tissues*
Regions of actively dividing cells (baby cells)
Apical Meristem
Tips of roots/stems
Vascular Cambium
Produces xylem/phloem
Cork Cambium
Produces tough outer coating for stems and roots
Roots*
Undergroud parts of a plant
Root Hair
Projection of single epidermis cell that increases surface area in contact with soil
Cortex
Ground tissue involved in transport of the H2O into the vascular system
Endodermis
Single layer of cells in center of cortex that forms H2O proof seal and controls H2O flow
Pericycle
Inside endodermis and forms shoots of older roots
Root Cap
Tough protective layer of parenchyma cells
Stems*
Above ground part that supports leaves and flowers
Herbaceous Stems
Green soft and flexible, and carryout photosynthesis
Woody Stems
Hard and rigid and contains xylem
Sink
Portion of plant that stores sugar
Translocation*
Movement of sugars from leaves through phloem
Leaves*
Main purpose=photosynthesis, flat with large surface area to capture more sunlight
Petiole
Stalk of leaf
Compound Leaves
Single blade divided into leaflets
Whorled Leaves
Three or more leaves on the same part of a stem
Mesophyll*
Photosynthetic tissue in a leaf
Transpiration*
Loss of H2O through stomata
Venation Pattern
Pattern of vascular tissue in leaves used to distinguish different groups of plants
Hormone
Chemical produced in one part of an orgamism and transported to another part that causes physiological changes
Auxins
Promote cell elongation
Gibbrellins
Promote cell elongation and growth
Cyrtokinins
Stimulate cell division by increasing protein production for mitosis
Ethelyene
Carbon and hydrogen gas that speeds ripening of fruit
Tropism*
Plant's respone to gravity
Gravitropism
Plant's response to gravity
Thigmotropism
Response to touch
Nastic Movement
Response not dependent on direction of stimulus