alternation of generations
life cycle that has two alternationg phses (haploid and diploid phase)
angiosperm
any group of seed plants that bear their seeds within a layer of tissue that protects the seed (flowering plant)
antheridia
male reporductive structue in plants; produces sperm
archegnia
structure in plants that produces egg cells
auxin
hormone that helps the growth of roots
blade
leaf
bryophyte
group of plants that have specialized reproductive organs but lack vascular tissue
cotyledon
first leaf or leaves produced by the embryo
cuticle
waxy layer that covers the leaves and stems of a plant
dicot
angiosperm with 2 leaves in its ovary
ethylene
hormone that helps ripen fruits
fibrous roots
when roots grow to such an extent that no root grows larger than the rest
gametophyte
gamete producing plant; multicellular haploid pase of a plants life cycle
geotropism
tropic movement to gravity
guard cells
cell that controls the stomata
gymnosperm
group of seed plants that place their seeds directly on the scales
hormone
chemical produced in one part of an organism that affects another part of the same organism
monocot
angiosperm with one seed leaf in the ovary
nastic movement
very fast plant movement (venus fly trap)
non-vascular
plant without a vascular system consisting of xylem and phloem
petal
colored part of a flower
phloem
carries sugar from the leaves to the rest of the plant
phototropism
tropic movement towards light
pistil (carpel)
female reproductive part of a flower
sporophyte
spore-producing plant; the multicellular diploid phase of
a plant life cycle
stamen
pollen producing part of a flower (male)
stoma (stomata)
opening in the epidemis of a plant that allows organic compounds to diffuse in and out of the leaf
taproot
primary root; longest and biggest root in a plant
thigmotropism
response of a plant to touch
tropism
movement of a plant awya from stimuli
vascular (tissue)
specialized tissue in plants that carries water and nutrients
xylem
carries water from roots to leaves