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14 Cards in this Set

  • Front
  • Back
nitrogen fixation
process by which certain bacteria convert nitrogen gas to ammonia
legume
member of a group of plants that house their own nitrogen-fixing bacteria
root nodule
lump on a plant root that contains nitrogen-fixing bacteria.
root hair
outgrowth of a root's epidermal cell that increases the surface area available for absorption.
root pressure
force that helps push water up the xylem in a plant
endodermis
layer of cells surrounding a plants vascular tissue
transpiration
evaporation of water from a plants leaves
tracheid
long cell with tapered ends that transport water in the xylem
vessel element
short wide cell that transports water in the xylem of a plant
guard cell
one of a pair of cells that open and close the stoma of a plant by changing shape, allowing gas to exchange with the surrounding air.
sieve-tube member
one of a chain of cells that forms the sieve-tube which phloem sap flows in a plant.
companion cell
cell found alongside a sieve tube in a plant that may provide resources to the sieve-tube members.
pressure-flow mechanism
process by which phloem sap moves through a plant
epiphyte
plant that grows on another plant and absorbs nutrients through rain that falls on its leaves.