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Plant
Sexual Reproduction
Flowers
Reproductive part of
plant.
Made-up of 4 floral
organs. Note : organ=many tissues performing 1 function eg fruit, leaf.
Male structures
Stamen.
Female structures:
Pistil.
Flowers
Monocts
Dicots
Floral organs:
Complete flower:
.
Incomplete flower:
Perfect flower:
Imperfect flower:
o
Monecious:
Corn: pollen from
flowers at top fall onto stigma below. Fertilized ovaries become kernels of
corn.
Dioecious:
Holly (females have
berries); Gingko (female plants outlawed, the fruit stinks!!!).
.
Pollination
Pollination is the
transfer of pollen from an anther to a stigma.
Pollination Facts.
A single stamen of
corn contains 2,000-2,500 pollen grains.
1 healthy ragweed
plant can release one billion pollen grains
Flowers pollinated by
birds generally produce lots of nectar.
Fertilization
After pollination,
the pollen grain sends a tube down the style to the ovary.
.
Seeds
End product of sexual
reproduction of flowering plants.
Each seed contains:
embryonic plant, endosperm & a seed coat.
Seed germination and
development
Fruits
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