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Regeneration of the Worm

Regeneration of the Worm. By: Will Bampfield and Tom Antenuci. Genus Species. Lumbricus terrestris. L. terrestris. How Regeneration of the Worm Works. The regeneration of worms is made possible because of a process called mitosis.

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Regeneration of the Worm

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  1. Regeneration of the Worm By: Will Bampfield and Tom Antenuci

  2. Genus Species • Lumbricusterrestris L. terrestris

  3. How Regeneration of the Worm Works • The regeneration of worms is made possible because of a process called mitosis. • Mitosis is the process in cell division when the nucleus divides, consisting of four stages, prophase, metaphase, anaphase, and telophase, normally resulting in two new nuclei, each of which contains a new, full copy of the parental chromosomes

  4. Interphase of Mitosis • DNA has replicated, but has not formed the condensed structure of chromosome. They remain as loosely coiled chromatin. • The nuclear membrane is still intact to protect the DNA molecules from undergoing mutation.

  5. Prophase • The DNA molecules progressively shorten and condense by coiling, to form chromosomes. The nuclear membrane and nucleolus are no longer visible. • The spindle apparatus has migrate to opposite poles of the cell.

  6. Metaphase • Metaphase is easily indentified because the chromosomes are lined up at the equator of the cell. • During this phase, once microtubules have found and attached to the kinetochores, protein structures on chromatids where the spindle fibers attach during cell division, the two centrosomes begin pulling the chromosomes through their attached centromeres towards the two ends of the cell.

  7. Anaphase • The spindle fibers begin to diminish and the centromere severs, separated sister chromatids are then pulled along behind the centromeres. • The chromosomes are moved away from each other to opposite sides of the cell.

  8. Telophase • The chromosomes reach the poles of their respective spindles. • Nuclear envelope reform before the chromosomes uncoil. The spindle fibers then begin to disintegrate.

  9. Impact on the Worm itself • Regeneration of worms helps them not necessarily reproduce but “recreate” themselves. • Their regeneration aids in a larger population of worms. • If worms could not regrow their bodies, they would have shorter life spans because they would be forever missing half of their body.

  10. Impact on Humans • The regeneration of earthworms in very beneficial to the human race. • Earthworms are a natural fertilizer to the earths soil. • They help spread nutrients throughout the soil and make it easier for many crops to grow. • Without earthworms, crop failures would be more common.

  11. Video • http://www.youtube.com/watch?v=bFpblBf1dfE

  12. Works Cited • Decelles, P. (n.d.). Mitosis. Retrieved March 21, 2013, from http://staff.jccc.net/pdecell/celldivision/mitosi s1.html • Earthworm Facts. (n.d.). Retrieved March 21, 2013, from      http://www.biologyjunction.com/earthworm%20facts.htm  • Stages of Mitosis. (n.d.). Retrieved March 21, 2013, from      http://library.thinkquest.org/C0118084/Gene/Chromosom al_Inheritance/       StagesMitosis.htm  

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