Chapter 3 Flashcards
The primary function of ______ is to produce seeds for reproduction
flowers
enlarged end of a stem
pedicel
part of the flower that holds developing seeds
receptacle
leaf-like structures that protect the petals
sepals
most conspicuous part of a flower
petal
part of the flower that is an organ that produces pollen
stamens
contains the sperm cells (male cells) of the flower
pollen
slender, elongated stalk that is part of the stamen
filament
enlarged structure at the tip of the filament; produces pollen
anther
elongated, vase-shaped central structure of a flower
pistil
swollen base of the pistil
ovary
undeveloped seed
ovule
contains egg cells (female cells)
ovules
The 1 is the male reproductive part of a flower and the 2 is the female reproductive part
- stamen
- pistil
stalk-like structure that connects the ovary to the tip of the pistil
style
tip of the pistil that receives the pollen grains at the time of pollination
stigma
flower that has the sepals, petals, stamens, and pistils
complete flower
flower that lacks one or more of the four basic flower parts
incomplete flower
any plant on which both staminate and pistillate flowers are produced in the same plant
monoecious
plant that produces staminate and pistillate flowers on separate plants
dioecious
many flowers on one stem
inflorescences
chief factor affecting flowering
length of daylight and night
ovary that has ripened
fruit
functions as the seed-bearing structures of flowering plants
fruit
transfer of pollen from an anther to the stigma of a pistil
pollination
pollination that occurs within the same flower
self-pollination
occurs when the pollen from an anther of one plant is transferred to a stigma of a flower on another plant
cross-pollination
sweet-tasting, watery liquid produced by plants
nectar
allergic reaction to pollen
hay fever
chemical messenger that triggers symptoms to pollen as a reaction
histamines
most important type of pollen that triggers hay fever
ragweed
occurs when the sperm cell fuses with the egg cell
fertilization
reproductive cells
gametes
reproduction in which the sperm and egg cell unite
sexual reproduction
forms after pollination by the pollen grain
pollen tube
forms when the sperm cell unites with the egg cell
embryo
nutritional tissue that surrounds the fertilized egg and provides nourishment to the growing embryo
endosperm
two sperm cells are required for reproduction
double reproduction
occurs when a fruit grows larger and develops
ripening
form from one flower that has only one pistil
simple fruits
form from one flower that has several pistils
aggregate fruits
fruit that forms from several flowers
multiple fruit
simple fruits in which the entire ovary is fleshy and juicy throughout
berries
fruits with woody inner layer and fleshy outer layer
drupes
simple fruits with an outer fleshy layer and an inner papery core
pomes
fruits that consist of a pod enclosing several seeds
legumes
fruits that consist of
small dry seeds with one or more wing-like structures attached to them
samaras
simple dry fruits consisting of a seed enclosed in a hard covering
nuts
simple fruits consisting of a
seed and a thin shell
achenes
the fruit of a grass plant
grain
example of aggregate fruits
blackberries
example of multiple fruits
pineapple
shell-like fruit covering of wheat that can be removed only by milling
bran
part of wheat used in making white flour
endosperm
embryo of the young wheat plant
germ
able to germinate and grow
viable
seed dispersal where an outside source carries the seeds
agent dispersal
seed dispersal where the plant is responsible for spreading its seeds
mechanical dispersal
part of the seed that is a tiny shoot that will develop into the stem and leaves of the plant
plumule
part of the seed that will develop into the root system of the plant
radicle
part of the seed that provides nutrition to the growing embryo
endosperm
part of the seed that provides a protective covering for the seed
seed coat
scar of the seed coat that marks where the seed was attached to the ovary wall during its development
hilium
sprouting of a seed
germination
period of inactivity
dormancy
Most of the food stored in the cotyledons is in the form of _____
starch