The length of the pollen tube depends on the distance between : (a) pollen grain and the upper surface of the stigma (b) pollen grain on the upper surface of stigma and ovule (c) pollen grain in anther and the upper surface of the stigma (d) the upper surface of stigma and lower part of the style
When a pollen grain falls on the stigma of the pistil, the pollen grain grows a ______ downwards through the style towards the female gametes in the ovary.
What will happen if pollen grains of rose land on the stigma of hibiscus?
how does the pollen tube occur immediately after pollen grains fall on the stigma?