Class 12BiologySexual Reproduction in Flowering PlantsMix Examples-Sexual Reproduction in Flowering Plants
MediumList the changes observed in an angiosperm flower subsequent to pollination and fertilisation.
(N/A) Following pollination and fertilisation in an angiosperm flower,the following post-fertilisation changes occur:
$1$. The sepals,petals,and stamens usually wither and fall off,although the sepals may sometimes persist.
$2$. The zygote develops into the embryo.
$3$. The primary endosperm nucleus $(PEN)$ develops into the endosperm,which provides nourishment to the developing embryo.
$4$. The ovule matures into the seed.
$5$. The ovary matures into the fruit.
$6$. The ovary wall develops into the pericarp (fruit wall).
$1$. The sepals,petals,and stamens usually wither and fall off,although the sepals may sometimes persist.
$2$. The zygote develops into the embryo.
$3$. The primary endosperm nucleus $(PEN)$ develops into the endosperm,which provides nourishment to the developing embryo.
$4$. The ovule matures into the seed.
$5$. The ovary matures into the fruit.
$6$. The ovary wall develops into the pericarp (fruit wall).
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$(i)$ In western countries, a large number of pollen products in the form of syrups are available in the market.
$(ii)$ In rice, pollen grains lose viability within $30$ minutes of their release.
$(iii)$ Pollen grains are stored at $-196^{\circ}C$ (cryopreservation) in liquid nitrogen, not at room temperature, for future use.
$(iv)$ Pollen grains are released from the anther, not from the seeds of wheat and rice.
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