in the angiosperm ovule,central cell of the embryosac,prior to the entry  of the pollen tube,contains?
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b)Unique to Angiosperms, flowering plants exhibit double fertilization whereby two sperm nuclei are deposited in the female gametophyte with each undergoing a fertilization event. The first sperm nucleus undergoes fusion with the egg cell nucleus forming the zygote while the second sperm nucleus undergoes fusion with the two polar nuclei of the central cell resulting in a triploid cell that proliferates through mitosis giving rise to the endosperm. The endosperm is often a source of nutrition for the developing embryo after fertilization and is often a starchy tissue.
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Here's what they have in common:\n1. Cell membrane is present.\n2. Vacuoles are present.\n3. Both are living cells.\n4. Mitochondria is present.\n5. Both are eukaryotic cells. \n6. Nucleus, nuclear membrane and chromatin fibers are present.\n7. Both can reproduce through mitosis. (Advanced animal cells reproduce through meiosis)\n\nPS : Don't take note of those who talk of the absence of mitochondria in plants. It's present. Only chloroplast is absent in animal cell.
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Before implantation, their is the sex act where the man delivers its sperm in to the females vagina. the spermatozoa travel trough the vagina, uterus, and through the what is called the fallopian tubes. The fertilization process occurs at the 2/3 of the outer fallopian tubes. After the fertilization of the male spermatozoa and the female ovum the zygote travels to the endometrium tissue (uterus) and implants itself into the tissue of the uterus and development begins.
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There are actually TWO organelles that play a direct role in the process of cell division.\n\nThe centrioles are the structures that establish the poles during mitosis and meiosis. But don't forget the cytoskeleton, which is hugely important during the cytokinesis part of each process.
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The angiosperm primary cell wall (PCW) composition is Glc, Gal,Ara, Xyl, Fuc, GalA, Rha, GlcA and Man. PCW composition among angiosperms differs only in proportional\nquantity of each monosaccharide. PCWs of gramineous monocots contain more Xyl and less Gal, Ara and Fuc than those of other angiosperms.  Do not confuse this with bryophytes, which naturally contain more GalA, GlcA and Man.
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The Flower:\nThe flower is the reproductive unit of some plants (angiosperms). Parts of the flower include petals, sepals, one or more carpels (the female reproductive organs), and stamens (the male reproductive organs). \nThe Female Reproductive Organs:\nThe pistil is the collective term for the carpel(s). Each carpel includes an ovary (where the ovules are produced; ovules are the female reproductive cells, the eggs), a style (a tube on top of the ovary), and a stigma (which receives the pollen during fertilization). \n\nThe Male Reproductive Organs:\nStamens are the male reproductive parts of flowers. A stamen consists of an anther (which produces pollen) and a filament. The pollen consists of the male reproductive cells; they fertilize ovules. \n\nFertilization:\nPollen must fertilize an ovule to produce a viable seed. This process is called pollination, and is often aided by animals like bees, which fly from flower to flower collecting sweet nectar. As they visit flowers, they spread pollen around, depositing it on some stigmas. After a male's pollen grains have landed on the stigma during fertilization, pollen tubes develop within the style, burrowing down to the ovary, where the sperm fertilizes an ovum (an egg cell), in the ovule. After fertilization, the ovule develops into a seed in the ovary. \n\nTypes of Flowers:\nSome flowers (called perfect flowers) have both male and female reproductive organs; some flowers (called imperfect flowers) have only male reproductive organs or only female reproductive organs. Some plants have both male and female flowers, while other have males on one plant and females on another. Complete flowers have stamens, a pistil, petals, and sepals. Incomplete flowers lack one of these parts. \n\nto find an extensive biology of plants please visit:\nhttp://users.pandora.be/educypedia/education/plantbiology.htm
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Plant cells are surrounded by a cell wall and have chloroplasts and large central vacuoles.  Animal cells have lysosomes and centrioles.
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YES plant cells do not have cell wall.\nBut animal cells have small spherical organells on the nucleus called centrioles.At the time of cell division , the spindle fiber formation originates from the centioles in animal cells\nIn the cytokynesis when the cyto plasm divides then only cell membrane develops in animal cell and cell plate develops in plant cell
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I'm not sure what your asking???  \nIs it the plant cell????
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An anther and a filament.  The anther makes pollen which contain the male's reproductive cells.
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Chloroplast not only have a membrane but they have two an outer and inner. I would go with ribosomes. Everything else has a cell membrane.\nWell this is if you consider the question to ask if the organelle itself has a membrane or the cell in which the orgnelle is contained has a cell membrane.\nI took Ap Bio 2 years ago but I believe the a plant cell also has a cell membrane even though it has a cell wall. The wall keeps them from bursting when they get too much water through osmosis. An animal cell would burst.
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pollination is the transfer of pollen from the anther to the stigma of a plant.  Fertillization is the creation by the physical union of male and female gametes, pollen and ovule in a plant
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Mammalian ovum is round and that helps in its movement through the fallopian tube since it does not have a tail like the sperm.  But the ovum is not smooth over the surface due to layers of cells.  Read through and i think my answer will help u..................The zona striata or zona pellucida is a thick membrane, which persists for some time after fertilization has occurred, and may serve for protection during the earlier stages of segmentation.  The phenomena attending the discharge of the ova from the follicles belong more to the ordinary functions of the ovary.
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A 'spermatozoon', 'spermatozoan', or 'sperm cell'.  (I believe that any of these is more correct than 'sperm'.)\n\nIncidentally, if it had an X chromosome, then it could either be a sperm cell or an egg cell (ovum).
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An angiosperm is a flowering plant such as a rose or a maple tree. They are not to be confused with gymnosperms the other type of flowering plant. Angiosperms are seed-bearing plants. They are in the Magnoliophyta division. They are divided into monocots and dicots. Cell walls are present in plant and animal cells but fungi cells have some sort of surrounding over them. Whether it's an angiosperm, gymnosperm, fern, or anything else a plant cell will have a cell wall. I thought you just had no idea what an angiosperm even was when you asked the question or you might not have asked it if you did.
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its triploid,that means three sets of chromosomes.one from the haploid sperm of the pollen grain and two from the diploid secondary nucleus present in the embryo sac of the ovule,in the ovary.got it now!
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The sperm and egg (1n) come from the gametophyte through mitosis. After fertilization, the zygote grows into a sporophyte (2n). The sporophyte creates spores (1n) by meiosis which grows into a gametophyte (1n). It's a cycle! Hope this helps!