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27 Cards in this Set

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A swollen structure that serves as an attachment point for most of the other parts.
Receptacle
makes up the outer layer of a developing flower; are often green, although some are brightly colored
Sepals
often brightly colored and may serveto attract pollinators such as insects and birds.
Petals
Name given to all the pedals of a flower together
Corolla
the female reproductive part of a flower
Pistil
A pistol consists of
stigma, style, and ovary
a swollen area at the top of the pistil
stigma
a stalk like structure between the stigma and the bottom of the pistil
style
bottom of the pistil where one or more eggs will be produced
ovary
Male reproductive parts of the flower
Stamens
Stamens are usually attached near the...
base of the pistil
The top of the stamen is called the...
Anther
A thin stalk which supports each anther
Filament
Anthers produce ______ that in turn will produce_____ in male gametes
Pollen grains; sperm
occurs when pollen attaches to the stigma
pollination
occurs when sperm fuses with egg
fertilization
pollen travels to the stigma by..
water, wind and animals
Characteristics of plants pollinated by wind
small and indistinct...very little or no scent... no nectar...small and numerous pollen grains... smooth pollen, some have wing like structures...less directed... allergy "culprits"
pollen attaches to the stigma of the same plant
self-pollination
pollen attaches to the stigma of a different plant
cross-pollination
animals are attractedto flowers to receive...
nectar
nectar is produced by
nectaries
Where in a plant does pollination occur?
stigma
Where in a plant does fertilization occur?
ovaries
If pollination occurs, does this mean fertilization must occur?
no
If fertilization occurs, does this mean that pollination has occurred?
yes
Why do plants expend much energy to promote cross-pollination, when self-pollination is possible? What are the costs of self-pollination?
You decrease diversity, produce organisms not able to survive