Mechanisms of Pollination

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What is pollination in flowers?
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Pollination is the transfer of pollen grains from the anther to the stigma of a flower.
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Name three agents of pollination.
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Wind, water, and insects.
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What is the main advantage of cross-pollination?
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Cross-pollination introduces greater genetic diversity.
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Why do some flowers not require pollinating agents?
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These flowers can self-pollinate, transferring pollen to the stigma within the same flower.
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What is the role of pollinators in cross-pollination?
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Pollinators help transfer pollen from the anther of one flower to the stigma of another.
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What happens genetically during self-pollination?
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There is no mixing of genes, leading to less genetic diversity.
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What is the definition of sexual reproduction in flowers?
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It is the formation and fusion of male and female gametes to produce seeds.
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Name two main parts of the pistil in flowers.
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Stigma and ovary.
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What structures form the stamen in flowers?
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The anther and filament.
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Why is cross-pollination often genetically preferred?
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It allows more genetic variation, potentially producing more advantageous traits.
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How is pollen carried by wind pollination different from insect pollination?
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Wind-borne pollen is often lighter and smaller, while pollen for insect pollination may be stickier or heavier.
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How does water facilitate pollination?
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Pollen can be carried by water currents to reach other plants.
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Describe a feature of flowers adapted for wind pollination.
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They may have long stamens and pistils to catch the wind-borne pollen.
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How do insects assist in plant reproduction?
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Insects transfer pollen between flowers as they collect nectar.
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What plant structure captures pollen during pollination?
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The stigma.
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