Nobody downloaded yet

Theory of Endosymbiosis - Essay Example

Comments (0) Cite this document
Summary
The term Endosymbiosis literally means living inside in a mutually beneficial relationship. The Theory of Endosymbiosis was first put forward by Lynn Margulis in 1981, who suggested in her book Symbiosis in Cell Evolution that "the ancestors of eukaryotic cells were symbiotic consortiums of prokaryotic cells with one or more species (endosymbionts) being involved…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER97.1% of users find it useful
Theory of Endosymbiosis
Read TextPreview

Extract of sample
"Theory of Endosymbiosis"

Download file to see previous pages As they became more interdependent an obligatory symbiosis evolved." (Margulis, Live Chat, n.p.)
The Theory of Endosymbiosis also states that eukaryotic undulipodia originated from spirochete bacteria. The term "undulipodia" is used to describe the eukaryotic motility organelles, flagella and cilia. Undulipodia are composed of microtubules in a specific configuration. Microtubules are comprised of several closely related proteins called tubulins. These structures are far larger and more complex than bacterial flagella, which are made of flagellin proteins. The Endosymbiosis Theory postulates that undulipodia may be derived from bacteria through motility symbioses. This idea is referred to as the exogenous hypothesis. The series of explanations that lead up to the detailed elaboration of the endobiotic origins of the flagellum and cilia point to several lines of circumstantial evidence. The argument emphasizes the biology of the organelles themselves, their distribution, and the occurrence of related and analogous structures.
The Theory of Endosymbiosis significantly stimulated a variety of analytic approaches to the problem of organelle origins. Support for the endobiotic origin of mitochondria and chloroplast is very strong. Margulis included in her theory the proposition that the eukaryotic flagellum evolved from an endosymbiotic spirochete like prokaryote that became part of its eukaryotic protistan host. The major line of information in this regard has come from her studies of an unusual group of spirochetes that live on and in protists. These spiral bacteria depend for their locomotion on bundles of typical bacterial flagella, but some also have microtubules, which are not found in other prokaryotes but are ubiquitous in eukaryotic cells.(Avers, 124)
There is a substantial amount of evidence within the theory itself to suggest that such a postulation of evolution of the eukaryotic cell is correct, with regard to the origins of mitochondria and chloroplasts. Much of this evidence is based on the differing features of the two types of cells, and similarities between mitochondria and chloroplasts and present day prokaryotes, the bacteria. The considerable substantiations, as elaborated above seem to indicate that the theory of serial endosymbiosis is correct. One such fact is that previously non-existing mitochondria or chloroplasts, if required to be freshly produced, cannot be synthesized in the body without the presence of an original organelle. The reason for this is that the nucleus inside the cell, which contains the genetic code for the rest of the cell, encoded onto DNA molecules, does not contain sufficient coding to account for all of the proteins present in the organelles. There are some proteins present in the organelles which are missing altogether in the DNA code of the nucleus and there are some which differ slightly from those present inside the nucleus. The "missing" DNA is accounted for by the loop of DNA present inside the organelle. This DNA is of the same form as is present in all prokaryotic cells. That is, the DNA is circular, and it lies free in the "cytoplasm" of the ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Theory of Endosymbiosis Essay Example | Topics and Well Written Essays - 1000 words”, n.d.)
Theory of Endosymbiosis Essay Example | Topics and Well Written Essays - 1000 words. Retrieved from https://studentshare.org/science/1516558-theory-of-endosymbiosis
(Theory of Endosymbiosis Essay Example | Topics and Well Written Essays - 1000 Words)
Theory of Endosymbiosis Essay Example | Topics and Well Written Essays - 1000 Words. https://studentshare.org/science/1516558-theory-of-endosymbiosis.
“Theory of Endosymbiosis Essay Example | Topics and Well Written Essays - 1000 Words”, n.d. https://studentshare.org/science/1516558-theory-of-endosymbiosis.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Biology Questions
Structurally, both the eukaryotic and Prokaryotic cells usually bear proven distinctions. The latter has fewer organelles in its structure compared to eukaryotic, which has extra of the same contents in its structure and larger in size. Study theories claim that eukaryotic normally evolved from Prokaryotic, which yielded to the current state of the cells via endosymbiosis process (Virtual Fossil Museum).
6 Pages(1500 words)Essay
Theory
In the quest of sustainability and lead, many businesses adopted an extra edge in business operations. For instance, Japanese companies have been stringent in following Total Quality Management techniques for driving operational efficiencies. On the other hand, there had been firms polarized towards achieving sustainability with strengthening positioning aspect.
20 Pages(5000 words)Essay
Theory
He viewed his theoretical perspectives as an ‘appeal to architects’ (Samuel, 2007, p. 41) which must function as a guide to acknowledging the path to a form of architecture for the modern period. Le Corbusier, the designer, is the re-embodiment of the visual artist Charles-Edouard Jeanneret.
11 Pages(2750 words)Essay
The Evolution of the Eukaryotic Cell
In the Proterozoic Era, 2.5 billion to 544 million years ago, the atmospheric level of oxygen increased to 15% due to oxygen producing cyanobacteria.  The levels of oxygen in the atmosphere produced a fatal environment in which anaerobic organisms needed to evolve methods of coping with the presence of oxygen.
8 Pages(2000 words)Essay
Theory
ical world, by means of repeatable experiments and measurements, and the development of universal theories that are capable of describing and predicting observations. Statements in science must be precise and meaningful, such that other people can test them (in order to
2 Pages(500 words)Essay
TM04
(b) One of the leaves that you have been given is from a polar environment which has a 24-hour light regimen in the summer. Give one example of evidence you could present that would suggest that this environmental factor does not alter
3 Pages(750 words)Essay
Theory
Fortunately, the time has passed when victims of abusive were forced or decided to keep silent for fear of shame, criticism or more abuse. Now, most
4 Pages(1000 words)Essay
Theory
Kohlbergs theory of moral development has six stages that indicate that the ethical behaviour and moral reasoning of a person is fundamentally determined by justice and how they perceive it at
1 Pages(250 words)Essay
Genetics
single “composite” cell of higher complexity “evolved from more separate simpler cells living in a symbiotic relationship with one another” (Karp, 2009, p.25). The evolution of eukaryotic cells begins in step 1; a large anaerobic which is heterotrophic prokaryote taking
1 Pages(250 words)Essay
Exam 2
e various researches done on evolution of cells by different scientists each research is trying to elaborate himself by really looking in the weakness of the opponent as the weakness from you will be used as the improvement of the other. However, with criticism many theories
4 Pages(1000 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Essay on topic Theory of Endosymbiosis for FREE!
Contact us:
+16312120006
Contact Us Now
FREE Mobile Apps:
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • Miscellaneous
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us