AP Bio: Ch. 29

calyx

A flower's outer, protective whorl of sepals

corolla

A flower's whorl of petals; forms within sepals and encloses reproductive organs

pollinator

An organism that moves pollen from one plant to another

seed

Embryo sporophyte of a seed plant package with nutritive tissue inside a protective coat

Double fertilization

Mode of fertilization in flowering plants in which one sperm cell fuses with the egg, and a second sperm cell fuses with the endosperm mother cell

endosperm

Nutritive tissue in the seeds of flowering plants

ovule

Of a seed - bearing plant, structure in which a female gametophyte forms

Megaspore

Of seed plants, haploid spore that forms in an ovule and gives rise to an egg - producing gametophyte

microspore

Of seed plants, haploid spore that gives rise to a pollen grain

Anther

Part of the stamen that produces pollen grains

dormancy

Period of temporarily suspended metabolism

sepal

Unit of a flower's calyx; typically photosynthetic and inconspicuous

petal

Unit of a flower's corolla; often showy and conspicuous

flower

specialized reproductive structure of a flowering plant

Germinate

to resume metabolic activity after dormancy

stigma

upper part of a carpel; adapted to receive pollen

carpel

Floral reproductive organ that consists of an ovary, stigma, and often a style

vegetative reproduction

Growth of new roots and shoots from extensions or fragments of a parent plant; form of asexual reproduction in plants

coleoptile

In monocots, a rigid sheath that protects the plumule (embryonic shoot)

pollination

The arrival of pollen on a receptive stigma

stamen

floral reproductive organ that consists of an anther and, in most species, a filament

pollination vector

environmental agent that moves pollen grains from one plant to another

ovary

in flowering plants, the enlarged base of a carpel, inside which one or more ovules form

tissue culture propagation

laboratory method in which individual plant cells (typically from meristem) are induced to form embryos

fruit

mature ovary of a flowering plant, often with accessory parts; encloses a seed or seeds

nectar

sweet fluid exuded by some flowers that attracts animal pollinators