Ap Bio Ch30 Vocab

Front 1

Ovule

Back 1

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

Front 2

Flower

Back 2

In an angiosperm, a short stem with up to four sets of modified leaves, bearing structures the function in sexual reproduction.

Front 3

Anther

Back 3

In an angiosperm, the terminal pollen sac of a stamen, where pollen grains with male gametes form.

Front 4

Embryo Sac

Back 4

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

Front 5

Seed

Back 5

An adaptation for terrestrial plants sonsisting of an embryo packaged along with a store oof food within a resistant cell.

Front 6

Sepal

Back 6

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

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Stigma

Back 7

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

Front 8

Cross Pollination

Back 8

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

Front 9

Conifer

Back 9

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

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Petal

Back 10

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

Front 11

Style

Back 11

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

Front 12

Cotyledons

Back 12

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

Front 13

Tracheids

Back 13

A long, tapered water-conducting cell that is dead at maturity and is found in the xylem of all vascular plants.

Front 14

Stamen

Back 14

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

Front 15

Ovary

Back 15

In flowers, the portion of a carpel in which the egg-containing ovules develop.

Front 16

Endosperm

Back 16

A nutrient-rich tissue formed by the union of sperm cell with two polar nuclei during double fertilization, which provides nourishment to the developing embryo in angiosperm seeds.

Front 17

Vessel Elements

Back 17

A short, wide, water-conducting cell found in the xylem of most angiosperms and a few nonflowering vascular plants.

Front 18

Carpel

Back 18

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

Front 19

Fruit

Back 19

A mature ovary of a flower that protects dormant seeds and aids in their dispersal.

Front 20

Double Fertilization

Back 20

A mechanism of fertilization in angiosperms, in which two sperm cells unite with two cells in the embryo sac to form the zygote and endosperm.

Front 21

Filament

Back 21

The stalk of a stamen.

Front 22

Pollen Grains

Back 22

The structures that contain the male gametophyte of seed plants.