the time when the flower is fully expanded and mature; this is when pollination and fertilization usually take place.
transfer of pollen from anther to stigma. It occurs when the wind, insects or birds, etc. carry the pollen grains to the flower and they adhere to the stigma.
grows down style to ovary, carrying male sperm cells
fusion of male sex cell (sperm), and female sex cell (ovule), to form a zygote/embryo, and eventually new seeds.