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Half of the individual cell of ovule except female gametophyte cells
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How can you contrast a pollen grain and a seed?
Pollen grain after meiosis in the microspore mother cell and has haploid set of chromosomes. A seed develops from ovule after fertilization, in which the number of chromosomes get doubled. Pollen grain is unicellular, microscopic structure, a seed is multicellular macroscopic structure.
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.
What does a pollen grain and ovule each contain?
Pollen grains contain the male gametes required for sexual reproduction of a plant/ flower. These are haploid, and only contain half the full set of chromosomes; the other half is contributed by the female gamete (or ovule).A grain of pollen contains:a larger vegetative cell (also called the tube cell) inside of which is aa smaller germ cell (also called the generative cell).The pollen grain "germinates" on the stigma of the receptive flower and grows down the style, once it reaches the ovule the germ cell/ nucleus fuses with the nucleus of the ovule and an embryo is formed
What grows from the pollen grain go the ovule?
The pollen grain produces a pollen tube that grows towards the ovule in order to deliver the male gametes for fertilization. Once the pollen tube reaches the ovule, the male gametes are released to fertilize the female gametes inside the ovule, leading to the formation of seeds.
When a pollen grain joins with an ovam what is called?
Fertilization resulting in the formation of a zygote or embryo; technically, the pollen grain does not join with the ovule. A pollen tube grows from the pollen grain - this contains the gamete which fuses with the ovule.
What do we call the joining of the pollen grain with the ovule?
Pollination.
What does a pollen grain landing near a ovule produce?
It produces a pollen tube .
What is the pollen grain that sends tube down pistil and unites with the ovule?
The pollen grain that sends a tube down the pistil and unites with the ovule is called a sperm cell. This process is known as fertilization and it leads to the formation of a seed. The sperm cell from the pollen grain fertilizes the egg cell within the ovule, initiating seed development.
What is the joining of the nuclei from a pollen grain to those of an ovule called?
Fertilization
The structure that grows from a pollen grain to an ovule and enables a sperm to pass directly to an egg?
pollen tube
What is pollen tube germination?
Pollen tube germination is the process by which a pollen grain, upon landing on a compatible stigma, develops a tube that extends down the style toward the ovule in the ovary. This tube carries sperm cells from the pollen grain to fertilize the ovule, leading to seed formation. The germination process involves the hydration of the pollen grain and the growth of the tube, which is guided by chemical signals from the ovule. Successful germination is crucial for plant reproduction.
Describe how a pollen tube carries speem to the ovule inaflower?
In flowering plants, after pollination, a pollen grain germinates on the stigma, forming a pollen tube. This tube grows down through the style toward the ovule, guided by chemical signals. As the pollen tube extends, it transports sperm cells from the pollen grain to the ovule, where fertilization occurs, leading to the development of seeds. The successful delivery of sperm to the ovule is crucial for reproduction in flowering plants.
