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chapter 32 modern biology
vocab
48
Biology
Not Applicable
04/24/2005

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Term
anther
Definition
flower part containing microsporangia (629)
Term
antheridium
Definition
in plants, algae, and fungi a reproductive structure that produces
gametes by mitosis (625)
Term
archegonium
Definition
in seedless plants, a reproductive structure that produces a single
egg by mitosis (625)
Term
carpel
Definition
in flowers, female reproductive structures (629)
Term
clone
Definition
an offspring produced by asexual production (639)
Term
cutting
Definition
a piece of stem or root that is cut from a plant and used to grow new
plants (640)
Term
dormancy
Definition
a state of decreased metabolism (637)
Term
double fertilization
Definition
in plants, the process in which two types of cell fusion
take place in the embryo sac (633)
Term
embryo sac
Definition
in plants, a megagametophyte containing seven cells and eight
nuclei (630)
Term
epicotyl
Definition
the stem above the cotyledons (636)
Term
filament
Definition
in flowers, the structure that supports the anther (629)
Term
generative cell
Definition
in a pollen grain, the cell that forms two sperm (632)
Term
grafting
Definition
a technique in which a portion of one plant is inserted into and grows
with the root or shoot of another (640)
Term
heterospory
Definition
a phenomenon in which two types of spores are produced by an
individual plant (627)
Term
hilum
Definition
a scar along the edge of a plant seed marking where the seed was
attached to the ovary wall (636)
Term
homospory
Definition
a phenomenon in which all spores look alike and produce similar
gametophytes (626)
Term
hypocotyl
Definition
a stemlike area in plants between the cotyledons and radicle (636)
Term
integument
Definition
in plants, one or two outer layers of the ovule; in animals, the outer
covering (628)
Term
layering
Definition
the process of causing roots to form on a stem (640)
Term
megagametophyte
Definition
female gametophyte (628)
Term
megasporangium
Definition
structure that produces megaspores (628)
Term
megaspore
Definition
a spore produced by meiosis in a megasporangium (627)
Term
megaspore mother cell
Definition
a diploid cell in the ovule that undergoes meiosis to
produce four haploid megaspores (630)
Term
microgametophyte
Definition
male gametophyte (628)
Term
micropyle
Definition
a small opening in the integument (628)
Term
microsporangium
Definition
structure that produces microspores (628)
Term
microspore
Definition
a spore produced by meiosis in a microsporangium (627)
Term
microspore mother cell
Definition
diploid cell in the pollen sac that undergoes meiosis
to produce four haploid microspores (631)
Term
ovary
Definition
egg producing gonad of a female (629)
Term
ovule
Definition
the megasporangium of a flowering plant (630)
Term
petal
Definition
one of the leaf-shaped parts of the corolla of a flower, usually brightly
colored and conspicuous (629)
Term
pistil
Definition
a plant structure formed of fused carpels (629)
Term
plumule
Definition
in plants, the structure composed of the epicotyl plus any embryonic
leaves (636)
Term
polar nucleus
Definition
in plants, a nucleus that migrates to the center of the cell during
embryo-sac formation (630)
Term
pollen grain
Definition
the microgametophyte of seed plants (628)
Term
pollen tube
Definition
a structure that grows from a pollen grain, down which the sperm
travels to the eggs (628)
Term
radicle
Definition
in plants, the embryonic root (636)
Term
receptacle
Definition
the swollen tip of a branch that is the base of a flower (629)
Term
seed coat
Definition
the protective structure of a plant seed (636)
Term
sepal
Definition
a modified leaf that protects a young flower (629)
Term
sorus
Definition
a cluster of sporangia in ferns (627)
Term
stamen
Definition
the structure in the flower of plants that produces pollen (629)
Term
stigma
Definition
an expanded apex of a pistil, supported by the style, the part of the pistil
that receives pollen (629)
Term
style
Definition
in plants, a stalklike structure of the ovary (629)
Term
tissue culture
Definition
the growing of living cells in a controlled medium (640)
Term
tube cell
Definition
the cell of a pollen grain that contains the tube nucleus (631)
Term
vegetative propagation
Definition
asexual reproduction in plants (639)
Term
vegetative reproduction
Definition
plant reproduction using nonreproductive parts (639)
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