Yes, it is.
No, after a research it is not seen that a pollen grain of a flower have only one lobe. Commonly pollen grain have two or three lobes.
When a flower is pollinated, the pollen grain lands on the stigma of the flower, which is the female reproductive organ. The pollen grain then germinates, forming a pollen tube that grows down through the style to reach the ovary where fertilization can occur.
This tiny grain is called pollen grain.
Nothjing would happen if a pollen grain from a rose flower fell on the stigma of a lemon flower
Nothjing would happen if a pollen grain from a rose flower fell on the stigma of a lemon flower
A pollen tube is a structure that develops from a pollen grain after it lands on the stigma of a flower. It grows down through the style of the flower to reach the ovary where it delivers the male gametes for fertilization to occur. This process is essential for plant reproduction.
pollen grains are little grains in side a flower
When a flower is pollinated, a grain of pollen falls on the stigma, which is the tip of the female reproductive structure called the pistil.
Pollen grains are often called as microspores or male gametes. They are produced in pollen sacs present in pollen chambers in the anthers of the flower. They are produced due to repeated division of microspore mothercells and are haploid (n).
The purpose of pollen is to transfer the male reproductive cells (sperm) to the female reproductive cells (ovules) and thus to allow sexual reproduction. Pollen can be so transferred by many methods - wind, gravity, insects, etc. The pollen receptive part of the flower (the stigma) is often sticky, or textured so the pollen will stick. Once attached the pollen grain grows a tube into the stigma and down the style into the ovule. This tube allows the male gametes to fertilise the ovule, creating a seed.
Stamen
when pollen grain are transferred from the stigma the ovule of the flower , whats takes place