gymnospermplant whose seeds are not enclosed by
carpels, that is,
ovary; contrast to
angiospermSource: Noland, George B. 1983. General
Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Full article >>>Search for
gymnosperm in these other data
bases too
Definition of
gymnosperm :
a vascular
plant that bears naked seeds not enclosed in any specialized chambers.
Full article >>>Gymnosperms have seeds but not fruits or
flowers. Gymnos means naked,
sperm means
seed:
gymnosperm = naked seeds.
Gymnosperms developed during the Paleozoic Era and became
dominant during the early
Mesozoic Era.
Full article >>>Gymnosperm seedlings also have
cotyledons, and these are typically numerous (multicotyledonous) but variable.
Full article >>>gymnosperm -- n. A
plant that produces seeds, which are not enclosed; includes any
seed plant that does not produce
flowers.
gynostemium -- The central reproductive
stalk of an orchid, which consists of a
stamen and
pistil fused together.
Full article >>>GymnospermsFossil from the Devonian period reveal fernlike
plants that were
heterosporous; that is, produced two kinds of
spores.
microspores (male) and
megaspores (female).
Full article >>>gymnosperms:
vascular plants having naked seeds, such as the conifers.
H
haploid:
cells containing one copy of each
chromosome.
Full article >>>gymnosperm(jim-noh-spurm) [Gk. gymnos, naked +
sperma,
seed]
A vascular
plant that bears naked seeds not enclosed in any specialized chambers.
Full article >>>gymnosperm Seed-producing
plants in which the
seed is not enclosed in an
ovary as in angiospems. Ginkgos, cycads, and conifers are examples.
Full article >>>Gymnosperm(Gr.
gymnos
=naked;
sperm=
seed): Woody
plants whose life histories include alternation of generations and
ovules are not enclosed in a
carpel. The pollen typically germinates on the surface of the
ovule. A
super
class ...
Full article >>> Pinaceae
Gymnosperm family in which the leaves are needle-shaped
(pine; -aceae = ending for
plant families)
Pistil a "female"
plant part consisting of
ovary style and
stigma (
pistillum pestle = to pound beat) ...
Full article >>>Early
seed plants are referred to as
gymnosperms (naked seeds), as the
seed embryo is not enclosed in a protective structure at
pollination, with the pollen landing directly on the
embryo.
Full article >>>Angiosperms evolved from
gymnosperms, their closest relatives are Gnetae. Two key
adaptations allowed them to displace
gymnosperms as the
dominant fauna -- fruits and
flowers.
Full article >>>Transfer of pollen from the
anther to the
stigma in
angiosperms or from the
microsporangium to the
micropyle in
gymnosperms.
Clone bankSee
genomic library.
Full article >>>'"/>