State two changes which take place in the flower after pollination​

After pollination and fertilization following changes occur in a flower: The petals, stamens, style and stigma of the flower fall off.  Sepals dry up and hold the ovary.  The ovules confined in the ovary develop into seed

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characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.