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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.
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∙ 8y ago
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∙ 12y agoPollen grain absorbs sugary secretions of the stigma, swells in size, exine (Outer wall of the pollen grin)ruptures and intine (Inner wall of the pollem grain) develops into a long tube called pollen tube.
it passes through out the length of style and enters into the ovary and then into ovule by either of three methods.
porogamy : It enters into the ovule through the micropyle.(Opening of the ovule)
chalazogamy : It enters through the chalaza.
Mesogamy : It enters either through integuments or through funicle. (Stalk of the ovule)...
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∙ 12y agoI you want to install Microsoft products on a computer without a Microsoft operating system, you might want to get an emulator. If you are using Windows, try Control Panel > Add or remove software.
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∙ 9y agopollen tube
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∙ 14y agostyle
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∙ 9y agopollen tube
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∙ 13y agoa circle
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∙ 6y agothe pollen tube
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How does pollen that fertilizes the egg reach the ovule?
Some of the pollen grains carried by wind,insects,birds or bats may reach a carpel and stick to the ripe stigma.Each pollen grain produces a tiny tube which grows down to the style,into the ovary and towards the ovules or egg cells.when one of the tubes reaches an ovule,it bursts open.A male nucleus from the pollen grain then moves down the pollen tube to join with the nucleus of the female sex cell,the ovule.when the nuclei of the pollen grains and ovules have joined together, the ovules are said to be fertilized.
What do you call the transfer of pollen from one plant to another?
If the plants are compatible cross pollination will occur.
What happens when the pollen grain falls on the stigma?
when pollen grains falls on stigma, it creates a pollen tube which dilivers pollen grain and fuses with female gametes present in the ovule
What is the joining of the male nucleus from the pollen grain with the egg cell in the ovule called?
Its fertilization
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.
Where the pollen tube grow to or through?
The pollen tube grows out of or through the pollen grain.
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.
The structure that grows from a pollen grain to an ovule and enables a sperm to pass directly to an egg?
pollen tube
What happens when two pollen grains land on the same stigma and after the first grain fertilises the ovule?
When a pollen grain lands on stigma, pollination occurs. The pollen grain germinates and the pollen tube grows through the style. The sperm nucleus travels through the tube (generated by the tube nucleus) and fuses with an ovule which then develops into an embryo (or zygote)
What do we call the joining of the pollen grain with the ovule?
Pollination.
What does a pollen grain landing near an ovule produce?
It produces a pollen tube .
What does a pollen grain landing near a ovule produce?
It produces a pollen tube .
A pollen grain forms a tube leading to the flower's what?
Pollen grows a tube that travels down to the flowers ovary. From there, the nucleus of the pollen grains passes through the pollen tube to join the nucleus of the ovule to fertilize.
How does fertilization take place in flowers?
the pollen grain lands ot the tip of pistle called as stigma and then pollen tube from pollen grain germinates and it reaches the ovary through style(containing 2 male gamets).. then fertilisation takes place... or is when the male sex cells inside the pollen grains fuses with the female sex cells inside to produce a seed embryo Pollination transfers the pollen grain to the stigma. However, for hertilisation to take place, the nucleus of the pollen grain must fuse with the nucleus of the ovum, which is inside an ovule in the ovary. To transfer the nucleus to the ovum, the pollen grain grows a tube, which digest its way through the tissue of the style and into the ovary. Here it grows around the opening in an ovule. The tip of the tube dissolves and allows the pollen grain nucleus to move out of the tube and into the ovule. Here it fertilises the ovum (egg cell) nucleus.
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 transfer pollen from stamen to ovules?
A pollen tube grows from the pollen grain down through the style. The pollen tube enters the ovary and reaches an olvule. The sperm then travels down the pollen tube and fertilizes the egg in the ovule. So a pollen tube.
What is the joining of the nuclei from a pollen grain to those of an ovule called?
Fertilization
