Question
How does Differentiate between self-pollination and cross-pollination.
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Basis of differentiation
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Self pollination
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Cross pollination
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Meaning
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The process of transfer of pollen grains from anthers to the stigma of a flower, but when this process is between the flowers of the same plant than the term is called self-pollination.
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The process of transfer of pollen grains between the flowers of the different plants of the same species is called cross-pollination.
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It involves
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Single plant.
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Two different plants of the same species.
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Self pollination
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Self-pollination occurs in perfect flowers only.
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It occurs in both imperfect and perfect flowers.
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Pollinating agents
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Pollinating agents are not required.
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Pollinating agent such as wind, water, insects, etc. is not required.
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Pollen grains
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Less number of pollen grains are produced.
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A large number of pollen grains are produced.
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Examples
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Wheat, rice, pea, orchids, barley, tomatoes, peaches, apricot.
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Mulberry, maize, pumpkins, strawberries, blackberries, plums, grapes, daffodils, maple, catkins, grasses.
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Column I
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Column I
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$(a)$
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Large crystals
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$(i)$
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Turns lime water milky
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$(b)$
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Depositing a layer of zinc on iron
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$(ii)$
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Physical change
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$(c)$
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Souring of milk
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$(iii)$
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Rust
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$(d)$
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Carbon dioxide
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$(iv)$
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Sugar candy $(Mishri)$
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$(e)$
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Iron oxide
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$(v)$
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Chemical change
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$(f)$
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Dissolving common salt in water
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$(vi)$
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Galvanisation
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| Land breeze blows during | summer |
| Sea breeze blows during | winter |
| Dark coloured clothes are preferred during | day |
| Light coloured clothes are preferred during | night |
