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In ovule formation what happens when the pollen tube does not pass through the micropyle?
If the pollen tube does not pass through the micropyle during ovule formation, fertilization cannot occur because the sperm cells contained within the pollen tube will not reach the egg cell. This will prevent the fusion of gametes and subsequently the development of seeds.
What is the opening to the ovule of a conifer called?
The micropyle
Where the pollen tube grow to or through?
The pollen tube grows out of or through the pollen grain.
Does micropyle in the ovule help in diffusion of respiratory gases?
yes
How does the pollen get to the ovule to fertilize it?
Pollen is transferred from the male reproductive organ (anther) to the female reproductive organ (stigma) of a flower through pollination. Once the pollen lands on the stigma, it forms a pollen tube that grows down through the style and delivers the sperm cells to the ovule for fertilization.
In ovule formation what happens when the pollen tube does not pass through the micropyle?
If the pollen tube does not pass through the micropyle during ovule formation, fertilization cannot occur because the sperm cells contained within the pollen tube will not reach the egg cell. This will prevent the fusion of gametes and subsequently the development of seeds.
What is the opening to the ovule of a conifer called?
The micropyle
How does a pollen grain travel through the parts of a flower to finally become a seed?
The pollen grain released from the anther lobe during anthesis reaches the stigma by pollination. Thereafter, it germinates on the compatible stigma to send pollen tube to the micropyle of the ovule inside the ovary. The male gametes from the pollen grain are transferred to the embryo sac for fertilization and the ovule is converted into a seed when zygote develops into an embryo.
Where the pollen tube grow to or through?
The pollen tube grows out of or through the pollen grain.
Grows from the pollen grain to the ovule?
Pollen tubes grow from the pollen grains to the ovules. Lipids on the surface of the stigma stimulate growth of the pollen tubes. Self sterile plants prevent themselves from growing seeds by not creating these lipids.
Does micropyle in the ovule help in diffusion of respiratory gases?
yes
What is the function of the micropyle?
The micropyle opening allows the pollen tube to enter the ovule for fertilization. It absorbs water for germination. It provides for the diffusion of respiratory gases.
What are the differences between helium and micropyle?
Helium is a chemical element with the symbol He and is a colorless, odorless, and tasteless gas. It is the second lightest and second most abundant element in the observable universe. A micropyle, on the other hand, is a small opening in the surface of an ovule through which pollen grains enter for fertilization in plants. It is a specialized structure found in the reproductive organs of plants.
In what structure do the pollen grains come in contact with the ovule?
Pollen grains come in contact with the ovule through the stigma, which is the receptive tip of the female reproductive organ (pistil) in a flower. Pollen grains germinate on the stigma, form a pollen tube, and then grow down to the ovule for fertilization.
How does the pollen get to the ovule to fertilize it?
Pollen is transferred from the male reproductive organ (anther) to the female reproductive organ (stigma) of a flower through pollination. Once the pollen lands on the stigma, it forms a pollen tube that grows down through the style and delivers the sperm cells to the ovule for fertilization.
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 do the sperm nuclei in a pollen grain reach the egg nucleus in an ovule?
When they land on the style they begin to bore their way through the stigma all the way to the ovule. Through the tube made by the tube nucleus of the pollen grain: each pollen grain has two nuclei, one called generative nucleus which combines with the nuclei of the ovule, and the other called tube nucleus tube nucleus which forms a tube that penetrates the stigma till it reaches ovule then it degenerates.
