bio 1202 ch.30 crossword terms

stamen

The pollen-producing reproductive organ of a flower, consisting of an anther and a filament

dicot

A term traditionally used to refer to flowering plants that have two embryonic seed leaves, or cotyledons. Recent molecular evidence indicates that they do not form a clade; species once classified as this are now grouped into eudicots, magnoliids, and several lineages of basal angiosperms

carpel

The ovule-producing reproductive organ of a flower, consisting of the stigma, style, and ovary

pistil

A single carpel (a simple pistil) or a group of fused carpels (a compound pistil)

stigma

The sticky part of a flower's carpel, which receives pollen grains

micropyle

A pore in the integuments of an ovule

cross pollination

In angiosperms, the transfer of pollen from an anther of a flower on one plant to the stigma of a flower on another plant of the same species

endosperm

In angiosperms, a nutrient-rich tissue formed by the union of a sperm with two polar nuclei during double fertilization . This material provides nourishment to the developing embryo in angiosperm seeds

eudicot

A member of a clade that contains the vast majority of flowering plants that have two embryonic seed leaves, or cotyledon

ovule

A structure that develops within the ovary of a seed plant and contains the female gametophyte

pollen grain

In seed plants, a structure consisting of the male gametophyte enclosed within a pollen wall

basal angiosperm

A member of one of three clades of early-diverging lineages of extant flowering plants. Examples are Amborella, water lilies, and star anise and its relatives

flower

In an angiosperm, a specialized shoot with up to four sets of modified leaves, bearing structures that function in sexual reproduction

filameny

In an angiosperm, the stalk portion of the stamen, the pollen-producing reproductive organ of a flower

sepal

A modified leaf in angiosperms that helps enclose and protect a flower bud before it opens

anther

In an angiosperm, the terminal pollen sac of a stamen, where pollen grains containing sperm-producing male gametophytes form

integument

Layer of sporophyte tissue that contributes to the structure of an ovule of a seed plant

double fertilization

A mechanism of fertilization in angiosperms in which two sperm cells unite with two cells in the female gametophyte (embryo sac) to form the zygote and endosperm

conifer

A member of the largest gymnosperm phylum. Most are cone-bearing trees, such as pines and firs

seed

An adaptation of some terrestrial plants consisting of an embryo packaged along with a store of food within a protective coat

magnoliid

A member of the angiosperm clade that is most closely related to the combined eudicot and monocot clades. Extant examples are magnolias, laurels, and black pepper plants

monocot

A member of a clade consisting of flowering plants that have one embryonic seed leaf, or cotyledon

pollination

The transfer of pollen to the part of a seed plant containing the ovules, a process required for fertilization

cotyledon

A seed leaf of an angiosperm embryo. Some species have one, others two

ovary

In flowers, the portion of a carpel in which the egg-containing ovules develop; or in animals, the structure that produces female gametes and reproductive hormones

fruit

A mature ovary of a flower. This protects dormant seeds and often functions in their dispersal

embryosac

The female gametophyte of angiosperms, formed from the growth and division of the megaspore into a multicellular structure that typically has eight haploid nuclei

style

The stalk of a flower's carpel, with the ovary at the base and the stigma at the top

petal

A modified leaf of a flowering plant. These are the often colorful parts of a flower that advertise it to insects and other pollinators