Flowering Plants Life Cycle notes

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Flowers

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Plant Development O ver time the seed grows into a mature plant with the structures necessary for reproduction.

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The flower is the reproductive part of the plant that produces seeds .

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· Many flowers contain both male and female parts needed to produce new flowers.

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· Flower petals are often colorful or have a scent to attract insects and other animals.

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Stamen · The male part of a flower that has an anther on a stalk ( filament ). · The anther produces the pollen that contains the sperm cells.

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Pistil · The female part of the flower that contains § ovary - which contains the ovules where the egg cells are produced, § stigma - which is the sticky top where pollen grains land, and § style - which is a stalk down which the pollen tube grows after pollination has taken place

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Seed · The ovule that contains the fertilized egg ( embryo ) from which new plants are formed.

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· A fruit that is formed from the ovary often protects them.

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The ovules inside the ovary become seeds after fertilization.

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pollen grains pollen tube petal sepal anther filament stamen stigma style ovary pistil ovules

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Pollination P ollen produced in the anther of a flower, transfers from stamen to pistil .

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Fertilization P ollen forms a pollen tube to enter the ovary and combines with a ovule .

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Seed Production O nce the ovule is fertilized it developed into a seed. A fruit ( fleshy , pod , or shell ) then develops to protect the seed.

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Seed Dispersal S eeds are moved or transported away from the parent plant by wind , water or animals .

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Germination - the early stage of seed growth. After dispersal, seeds can either lay dormant or they can begin to grow immediately given the right conditions. The roots begin to grow down , while the stem and leaves grow up .

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