sexual reproduction in the flowering plant

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13 Terms

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pollination

the transfer of pollen from anther to stigma

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self pollination

pollen grains are transferred onto the stigma of the same flower

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cross pollination

pollen grains are transferred onto the stigma of a flower on another plot of the same species ; cross pollination is carried out by insects and wind

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endospermic seeds

food is stored in the endosperm eg maize wheat

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non - endospermic seeds

food is stored in the cotyledons eg pea , broad bean

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fruit

a mature ovary containing seed (s)

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functions of fruit

to protect seeds / to disperse seeds away from the parent plant

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importance of seed dispersal

to allow the plant to colonise new areas / to reduce / competition for space h20 light / to increase the chance of survival of the species

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dormancy

germination will occur even if conditions are suitable

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advantages of seed dormancy

to prevent germination at the wrong time of the year / to allow time for greater dispersal

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germination

when the embryo of a seed begins to grow again

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germination requires

water , oxygen , suitable temperature ,or seed absorbs h20 and 02 / enzymes digest food stored in the cotyledons or endosperm / nutrients are moved to the growing embryo

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