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