what is the job of the fibers in mitosis?
830815
to separate the sister chromatids, dragging one to each side of the cell on either side of the metaphase plate.  This allows replicated chromosomes to be divided between the original cell and the newly forming cell.
191138
The fibers form small cells which the water can fill. Wetting (a form of adhesion) of the fibers and surface tension (on water surfaces not contacting the fiber) tend to hold the water in the cells.
773929
(for animal cells..)\n1. non-kinetochore microtubules lengthen. this elongates the cell even more than before.\n2. pairs of sister chromosomes attach at opposite ends of the cell.\n3. new nuclear envelopes form around the two sets of dna at the opposite ends of the cell.\n4. cytokinesis (division of cytoplasm) occurs and the plasma membrane re-forms around the two daughter cells.
838524
Human cells have 46 chromosomes. To ensure that each daughter cell receives one and only one of each chromosome, eukaryotic cells undergo a complex, multistep process called mitosis. Before mitosis can begin, eukaryotes must first replicate their DNA. This process is similar to but takes much longer than DNA replication in prokaryotes. Then, during mitosis, the replicated chromosomes line up along the center line of the cell. Tiny fibers, called spindle fibers, attach to the individual chromosomes and pull them apart, toward opposite poles of the cell, where they remain until the cell divides.\n\nLong story short, the new skin cell will still have 46 chromosomes.
1175961
the nucleus of the cell controls and coordinates all the work of the cell. this takes care of composition.the cell wall and the cell membrane proects the cell
937356
From Wikipedia, the free encyclopedia:\nMitosis divides genetic information during cell division. A cell in early anaphaseMitosis is the process by which a cell separates its duplicated genome into two identical halves. It is generally followed immediately by cytokinesis which divides the cytoplasm and cell membrane. This results in two identical daughter cells with a roughly equal distribution of organelles and other cellular components. Mitosis and cytokinesis together is defined as the mitotic (M) phase of the cell cycle, the division of the mother cell into two daughter cells, each the genetic equivalent of the parent cell.
1117207
Copied from website...\n\nMitosis is responsible for growth and development, as well as for replacing injured or worn out cells throughout your body. For simplicity, we have illustrated cells with only six chromosomes.\nClick for larger image\nInterphase : Chromosomes duplicate, and the copies remain attached to each other. \nProphase : In the nucleus, chromosomes condense and become visible. In the cytoplasm, the spindle forms. \nPrometaphase : The nuclear membrane breaks apart, and the spindle starts to interact with the chromosomes. \nMetaphase : The copied chromosomes align in the middle of the spindle. \nAnaphase : Chromosomes separate into two genetically identical groups and move to opposite ends of the spindle. \nTelophase : Nuclear membranes form around each of the two sets of chromosomes, the chromosomes begin to spread out, and the spindle begins to break down. \nCytokinesis : The cell splits into two daughter cells, each with the same number of chromosomes as the parent. In humans, such cells have two copies of 23 chromosomes and are called diploid.
1138838
I assume you are referring to the centriole, which is found in the nucleus and is responsible for the organization and migration of chromosomes during cell division. They have functions that are not quite understood that allow them to organize and coordinate microtubule assemblies, just like a computer but on a much smaller scale.
880811
I don't have any picutres for you to look at, but I can give you an explanation.\nanimal cells are going to be more rounded, and plant cells are more rectangular.\nRemember: PMAT, these are the phases of mitosis\nProphase-the chromatin begins to condense into chromosomes and the nucleus begins to break down.\nMetaphase-The Chromosomes line up or Meet or "MET" at the cellular equator\nAnaphase- The chromosomes are pulled apart at the centromere\nTelophase- The chromatin decondenses and the neclues reforms\nAlso, the diff. between animal and plant cells....\nAnimal cells have a cleavage furrowl like a figure-8.\nPlant cells build a cell plate in between the separated chromosomes\nMitosis results in two daughter chromosomes.
80916
============================================================\nMitosis is a special kind of cell division used by eukaryote cells. You will probably find a series of diagrams in your biology text book to show the stages of mitosis; these are:\n\nprophase \nmetaphase \nanaphase \ntelophase \n============================================================\n============================================================\n2. cell division \n\neukaryotic cell \n\na. By mitosis (def).\nb. Sex cells in diploid (def) organisms are produced through meiosis (def). \n\nprokaryotic cell \n\na. Usually by binary fission (def). No mitosis.\nb. Organisms are haploid (def). No meiosis needed. \n============================================================\n\nMore at the links:
241204
During *mitosis*, the cytoplasm of a cell and its organelles separate into two new *identical cells*?\n\nI'm not sure what else you're looking for here...
954953
Mitosis plays a role in the production of the population of cells that will give rise to the gametes, but not in the production of the gametes themselves. Sperm and ova are produced beginning with 'meiosis' or "reduction division". The immediate precursor cell to these gametes undergoes cell division with the separation of the diploid chromosome number to yield cells that are haploid, they only carry one of each chromosome and not the pair that is produced during mitosis in all other somatic cells.
893608
This is simple. The interphase is a stage of the cell cycle.\nHere is the article in Wikipedia:\n"Interphase is a phase of the cell cycle, defined only by the absence of cell division. During interphase, the cell obtains nutrients, and duplicates its chromosomes. Most eukaryotic cells spend most of their time in interphase. For example, human skin cells, which divide about once a day, spend roughly 22 hours in interphase. Cells during interphase may or may not be growing. At any given time, even in an area of rapid cell division such as the tip of a plant root, 90 percent of cells are in interphase. Some cells, such as nerve cells, can stay in interphase for decades. The cell grows and replicates its DNA and centrioles. There are 3 parts of interphase: G1 (growth 1 in which the cell creates organelles and begins metabolism), S phase (DNA synthesis in which the chromosomes of the cell are copied) and G2 (growth 2 in which the cell grows in preparation for cell division). Sometimes the cells exit the cell cycles (usually from G1 phase) and enter the G0 phase. In the G0 phase, cells are alive and metabolically active, but do not divide. In this phase cells do not copy their DNA and do not prepare for cell division. Many cells in the human body, including those in heart muscle, eyes, and brain are in the G0 phase. If these cells are damaged they cannot be replaced. Interphase is the step before the mitotic phase, though it is frequently erroneously thought to be part of mitosis. The mitotic phase follows interphase, and begins with prophase.\n\nDuring interphase, the chromosomes are found arranged in the nucleus and appear as a network of long, thin threads, called the chromatin. At some point before prophase begins, the chromosomes begin to replicate themselves to form pairs of identical chromosomes. The deoxyribose nucleic acid (DNA) of the chromosomes is in use only during interphase, when the cell is in a stable and self reliant phase. In prophase the two chromatids are still connected by something called the centromere. The sister chromosomes contract tightly. Meanwhile, the nucleolus and the nuclear envelope break down and disappear, since their components have been sufficiently altered. Outside the nucleus are two centrosomes which sprout microtubules by polymerizing free-floating proteins. The centrosomes push themselves to opposite ends of the cell. The network of microtubules forms the beginning of the mitotic spindle. These spindle fibers become visible. The centrioles separate starting to radiate bundles of fibers, called asters. The spindle fibers run from one centriole to the other, at both poles of the cell. At the onset of prophase, chromatin condenses together into a highly ordered structure called a chromosome."\n---- End of citation ---\n\n\nRegarding the staining of the onion specimen - you do this in order to see the inner parts of the cell at the microscope. There are diferent types of colorations and you use one or other dependeg on what do you want to see (for example some coloration could be used for seing the chromosomes, while other coloration might be better for examining the cell wall).
123361
During mitosis, the chromosomes are tightly bundled so they are less likely to tangle and tear. During interphase, the cell is growing, so needs to access the DNA for instructions. DNA which is tightly packed, is not very accessible. Also, during interphase, the DNA is being replicated, so the DNA must unwind, which would make it more diffuse/harder to see.
913144
between the cell wall and the nucleus.
364043
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.
926704
Wikipedia! \n\nLysosomes have different uses, the amount in a cell changes depending on the part of life the cell is going through. Near mitosis, there are more lysosomes to assist with the process.