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What are the 3 parts of a pollen grain?
The three parts of a pollen grain are the exine (outer layer), intine (inner layer), and the cytoplasm containing the male gametes. The exine is composed of sporopollenin and helps protect the pollen grain during transportation and fertilization.
What is difference between ungerminated pollen grain and germinated pollen grain?
Ungerminated pollen grain is inactive and has not started the process of fertilization, while germinated pollen grain has started growing a pollen tube towards the ovule for fertilization. Germinated pollen grain is actively involved in the fertilization process, while ungerminated pollen grain is not.
Do Dicot have pollen grain?
yes Dicot have pollen grain and in Dicots pollen grain possess 3 germ pores
In a grain of pollen what is the function of the sperm that doesn't join with the egg cell?
In a grain of pollen,what is the function of the sperm cell that doesn't join with the egg cell?
What is sporoderm?
Sporoderm is the outermost protective wall around the pollen grain or microspore. It is made up of many layers. The two main layers are Exine and Intine. Exine is outer while Intine is inner layer of sporoderm.
What makes seeds when combined with a flower's eggs?
This tiny grain is called pollen grain.
What is the function of tube nucleus?
The tube nucleus is a specialized structure found in the pollen grain of flowering plants. Its primary function is to guide the growth of the pollen tube during fertilization. Once the pollen grain lands on a compatible stigma, the tube nucleus directs the formation of the pollen tube, allowing sperm cells to travel to the ovule for fertilization. This process is crucial for the successful reproduction of flowering plants.
Does sperm cell grows out of a pollen grain?
No, sperm cells do not grow out of a pollen grain. In plants, sperm cells are produced within the pollen grain, and they are involved in fertilization when the pollen grain reaches a female reproductive structure. Each pollen grain contains two sperm cells.
Can a pollen grain of a flower have one lobe?
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.
What does a pollen grain landing near an ovule produce?
If a pollen grain lands near an ovule, it can lead to pollination, where the pollen grain forms a pollen tube that grows towards the ovule. Once the pollen tube reaches the ovule, fertilization can occur, resulting in the formation of a seed.
How close to the egg can the pollen grain get?
when a pollen grain lands on the stigma it creates a pollen tube that goes down to the egg where sperm fuzes with the egg.
What structure will pass down the pollen tube?
the pollen grain
