Presentación alvaro
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![Page 1: Presentación alvaro](https://reader035.fdocuments.us/reader035/viewer/2022062308/5588bf60d8b42a502c8b45a9/html5/thumbnails/1.jpg)
José Rodríguez
José Benedicto
Pablo Martínez
Daniel Plano
Juan Pablo
Álvaro Cánovas
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Flowers are the sexual ogans of flowering plants
Most flowers have got four main parts
petal
sepal
Pistil
Stamen
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petalThe petals look like brightly coloured leaves
All the petals together form the corolla
They protect the inner parts of the flower
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SepalThe sepals are small green leaves that grow at the base of the flower
All the sepals together form the calyx
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PistilThe pistil is the plant’s female reproductive organ
It’s got three main parts
Stigma
Style
Ovary
Ovules
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StamenAre the plant’s male reproductive organs
Each stamen has got a tube collect a filament and a sac called an anther
Each anther contains many grains of pollen
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For a flowering plant to reproduce the stigma must receive pollen from an anthen
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The movement of pollen grains fron the anther to the sitgma is called pollination
When a bee lands on a flower, some pollen sticks to the bee’s body. The bee carries this pollen to other flowers and pollinates them. This exchange of pollen between diferent flowers is called cross-pollination
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The wind can also carry pollen from one flower to another
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FRUIT AND SEEDS
When grains of pollen reach the stigma, they combine with ovules to form a seed
The union of pollen with an ovule is called fertilization
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After fertlization. the flower loses its petals. The fertilized ovules become seeds and the ovary grows until it become a fruit
The ovules are fertilized
The ovary grows larger
The fruit protects the seeds
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When the fruit is ripe, it falls from the plant. If the fruit falls in a place with light ,water and good soil ,the seeds can grow and become new plants
Germination takes place when a seed begins to grow into a new plant
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