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Were is pollen made?
Gymnosperms are heterosporous, producing microspores that develop into pollen grains and megaspores that are retained in an ovule. After fertilization (joining of the micro- and megaspore), the resulting embryo, along with other cells comprising the ovule, develops into a seed. The seed is a sporophyte resting stage.
What are the sturctures that produce the male gametophyte in angiosperms called?
The structures that produce the male gametophyte in angiosperms are called anthers. Anthers are located on the stamen of the flower and contain pollen sacs where microspores develop into pollen grains through meiosis and subsequent mitotic divisions.
How are pollen grains carried to female gametes in seed plants?
Pollen grains are carried to female gametes in seed plants by the wind, insects, birds, or other animals. Once the pollen grain reaches the female reproductive structure, such as the stigma, it germinates and forms a pollen tube that grows down to the ovule, allowing for fertilization to occur.
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.
Inside what structure do the sperm of seed plants form?
The sperm of seed plants form inside the pollen tube, a structure that develops from the pollen grain. The pollen tube grows towards the ovule to deliver the sperm cells for fertilization.
How can a plant become a fruit without the anther?
Other plant from the surroundings that has anther (produce the pollen grains) will fertilise the ovule. when the pollen grains landed on the stigma, the ovule is then fertilise.
How does sperm get from stigma to ovule in a flower?
In flowers, sperm are usually contained within pollen grains. These pollen grains are transferred from the stigma (the receptive surface) to the ovule (located within the ovary) through the elongated tube-like structure called the pollen tube. The pollen tube grows down through the style (the tube connecting the stigma and ovary) and delivers the sperm to the ovule for fertilization to occur.
Where do the pollen grains go after pollination?
After pollination, the pollen grains germinate on the stigma and grow a pollen tube down the style to reach the ovule. The pollen tube delivers sperm cells to fertilize the egg cell within the ovule, leading to the formation of a seed.
What does the style in a plant do?
The style transports pollen grains into the, ovary then into the ovule.
What does style do in a plant?
The style transports pollen grains into the, ovary then into the ovule.
What is develop when pollen grains fall down to the pollen tube to join the ovule inside the ovary?
fruit
After pollination the pollen grains begin to?
Pollen grains and on stigma of a compatible plant; the pollen grains germinate and grow down the style and into the ovary. Once in the ovary a sperm nucleus from the pollen grain fuses with the ovule (and forms into a zygote or embryo). The pollen tube then degenrates and the ovule forms into a seed.
Does pollen have a nucleus?
Yes, pollen grains have a nucleus. The nucleus contains the genetic information necessary for the pollen to fertilize a plant's ovule.
What is transferring pollen grains from another to the stigma of a flower?
when pollen grain are transferred from the stigma the ovule of the flower , whats takes place
The structure that grows from a pollen grain to an ovule and enables a sperm to pass directly to an egg?
pollen tube
Sticky secretion on the scales of seed cones traps?
A sticky secretion on the scales of seed cones traps pollen grains. Structure is produced by a pollen grain that lands near an ovule is pollen tubes.
What travels to fertilize the ovule?
Pollen travels to fertilize the ovule in plants. Pollen grains contain the male gametes that are necessary for fertilization to occur. The pollen is usually transferred from the anther to the stigma of a flower through various methods such as wind, insects, or animals.
