Advertisement Upgrade to remove ads

germinate

to begin to grow from an embryo into a mature form

seedling

a young plant grown from a seed

cone

a seed-bearing structure

deciduous

a tree that sheds and regrows its leaves in response to seasonal changes

ovary

the lower part of a pistil that produces eggs in ovules

seed plant

a plant that produces seeds

gymnosperm

a woody vascular seed plant whose seeds are not enclosed by an ovary or seed

angiosperm

a flowering pant that produces seeds within a fruit

microspores

the smaller, male spore

megaspores

the larger, female spore

heterospory

the production of two or more kinds of asexual spores

integument

the outer protective covering of an ovule or sporangia

micropyle

the small opening in the wall of an ovule through which pollen tube enters the ovule

ovule

structure in the ovary that contains an embryo sac and develops into a seed after fertilization

pollen grain

the structure that contains the male gametophyte of seed plants

pollination

the transfer of pollen to the pistil or ovule

pollen tube

a tube that grows from the pollen grain enters the embryo sac and allows fertilization

receptacle

the enlarged tip of a flower stalk to which the flower is attached

sepals

one of the outermost rings of modified leaves that protect the flower bud

petals

one of the usually brightly colored leaf-shaped parts that make up one of the rings of a flower

stamens

the male reproductive of a flower that produces pollen and consists of an anther

anther

the tip of a stamen which contains the pollen sac where pollen grains form

filament

the part of the stamen that supports the anther

carpels

the structure where the ovule is

pistil

the female reproductive part that produces seeds and consists of an ovary style and stigma, made of one or more fused carpels

ovary

the lower part of a pistil that produces eggs in ovules

style

the slender upper part of the pistil

stigma

the expanded apex of a pistil supported by the style the part of the pistil that receives the pollen

embryo sac

the female gametophye that develops from a megaspore

polar nuclei

the haploid nuclei in the embryo sac of a seed plant that fuses with a male gametete to form the triploid cell that develops into the endosperm

tube cell

the cell of a pollen grain that gives rise to the pollen tube

generative cell

the cell that divides mitotically and forms two sperm cells

nectar

the sugar containing fluid secreted by flowers to attract birds or insects for pollination

double fertilization

procces by which one of the two sperm nuclei fuses with the egg nucleus and polar nuclei

seed coat

the protective outer covering of a seed

plumule

the developing chute above the cotyledons in plant embryoes consits of an epicotyl and young leaves

epicotyl

the portion of the stem of a plant embryo that is between the cotyledons and the first true leaves

hypocotyl

the portion of the stem of a plant embryo that is between the cotyledons and the embryotic root

radicle

the embryotic or primary root

hilum

a scar that marks where the seed was attached to the ovary wall

dormacy

a sate in which seeds stop growth and development and reduce their metabolism especially respiration

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set