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Within a single pollen grain there are 2 sperm cells
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∙ 14y ago
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What is a pollen tube?
A pollen tube is part of the male gametophyte of seed plants. It acts as a conduit to transport the male gamete cells from the pollen grain
How does fertilization take place in a flower?
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.
The purpose of a pollen grain on a flower?
The purpose of pollen is to transfer the male reproductive cells (sperm) to the female reproductive cells (ovules) and thus to allow sexual reproduction. Pollen can be so transferred by many methods - wind, gravity, insects, etc. The pollen receptive part of the flower (the stigma) is often sticky, or textured so the pollen will stick. Once attached the pollen grain grows a tube into the stigma and down the style into the ovule. This tube allows the male gametes to fertilise the ovule, creating a seed.
What is the process of fertilization in flowering plants where new seeds are formed called?
Pollen germination to form the pollen tube through which the male gamets for fertilization are transferred. Simply the formation of male and female gametes sometimes termed as spores/pollens(in male plant or part) etc.
When a pollen grain joins with an ovum?
A polln grain after germination sends a pollen tube in the ovule to release male gametes near the egg cell or ovum.
When a pollen grain joins an ovum?
A polln grain after germination sends a pollen tube in the ovule to release male gametes near the egg cell or ovum.
What is responsible for reproduction?
reproduction are of 2 types sexual reproduction which involves gametes male gametes:-- sperms female gametes:-- ovum these 2 gametes need to be fused together to form an embryo then through mitosis it will divide millions of time to make a baby in plants male gametes:-- pollen grain female gametes:-- ovary in these when pollen gets in another flower due to pollination it forms an pollen tube through the style and fuses with the ovary and forms seeds!! in short the gametes are responsible for reproduction in sexual reproduction
What is a pollen tube?
A pollen tube is part of the male gametophyte of seed plants. It acts as a conduit to transport the male gamete cells from the pollen grain
How does fertilization take place in a flower?
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.
The purpose of a pollen grain on a flower?
The purpose of pollen is to transfer the male reproductive cells (sperm) to the female reproductive cells (ovules) and thus to allow sexual reproduction. Pollen can be so transferred by many methods - wind, gravity, insects, etc. The pollen receptive part of the flower (the stigma) is often sticky, or textured so the pollen will stick. Once attached the pollen grain grows a tube into the stigma and down the style into the ovule. This tube allows the male gametes to fertilise the ovule, creating a seed.
What is the process of fertilization in flowering plants where new seeds are formed called?
Pollen germination to form the pollen tube through which the male gamets for fertilization are transferred. Simply the formation of male and female gametes sometimes termed as spores/pollens(in male plant or part) etc.
What is fertililization desccribe the process of fertilization in plants?
The union of male gamete with female gamete during sexual reproduction is known as fertilization. In lower plants, the male gamete travels through its flagella in liquid medium to reach up to the egg of the female gamete to unite but in higher plants, male gametes are contributed by the pollen grains and female gamete develops in the ovary or embryosac. After pollination, the pollen grain germinates and sends a pollen tube towards the female gamete. Reaching the egg the male gametes travelling in the pollen tube are discharged and one of the male gamete fuses with the egg to form the zygote for embryo development and the other gamete of the same pollen grain fuses with the secondary nucleus (in case of Angiospermic plants) to form the primary endosperm nucleus. This double fusion of male gametes in angiospermic plants is known as double fertilization.
When a pollen grain joins with an ovum?
A polln grain after germination sends a pollen tube in the ovule to release male gametes near the egg cell or ovum.
How many cells does a mature male gametophyte have in an angiosperm contain?
a single pollen grain is only one cell. A mature pollen grain in many plants have two cells as a result of pollen mitosis- 1. the tube cell and 2. the germ cell. The tube cell forms the pollen tube at the time of pollen germination and the germ cell nucleus divides again to form two male gametes.
Function of anther in gumamela?
Petals Petals is the colorful part of the flower that can attract insects
How is fertilization in flowering plants different from fertilization in other plant groups?
Fertilization in flowering plants is achieved by transferring the male gamete through pollen tube whereas in nonflowering plants the male male gametes are motile and transferred in aqueous medium.
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.
