The Evolution of the Eukaryotic Cell - Essay Example

Extract of sample
The Evolution of the Eukaryotic Cell

The endosymbiotic theory related to the primitive origins of the organelles: mitochondria and chloroplasts.  According to the endosymbiotic theory, these originated as prokaryotic organisms, which were engulfed by a larger prokaryote through phagocytosis.  This larger prokaryote was probably a rickettsia bacterium, which is an anaerobic proteobacteria that was a precursor to the mitochondria organelle.  Similarly, chloroplasts come from an autotrophic prokaryote called endosymbiotic cyanobacteria.  The theory has in origins in 1905.  Konstantin Mereschkowsky with chloroplasts and Ivan Wallin in the 20s advanced a similar idea for mitochondria.  Later on, Henry Ris found that they contain DNA.  The modern attribution goes to Lynn Margulis for her work in 1981, Symbiosis in Cell Evolution.  She contended that eukaryotic cells started as communities of networking bodies such as endosymbiotic spirochetes that developed cilia and flagella.  Another organelle, the peroxisome, is thought to have emerged this way.  They, too, do not contain DNA, however.  Modern evidence that suggests the endosymbiotic theory is viable:• Mitochondria and chloroplasts contain DNA, which is different from that of the cell nucleus, and that is similar to that of bacteria (in being circular and in its size). • They are surrounded by two or more membranes, and the innermost of these shows differences in composition compared to the other membranes in the cell. ...Show more


An author of the following paper shall discuss the three theories regarding the evolution of eukaryotic organisms. All three theories propose that eukaryotes evolved from a prokaryotic ancestor because of a buildup of toxic substances from waste products…
Author : miracle61
The Evolution of the Eukaryotic Cell essay example
Read Text Preview
Save Your Time for More Important Things
Let us write or edit the essay on your topic
"The Evolution of the Eukaryotic Cell"
with a personal 20% discount.
Grab the best paper

Related Essays

Essay on Typical Cell
The cell is the simplest and smallest basic unit of animals and plants. Some organisms are unicellular, that is, consisting of a single cell like the bacteria, while others are multi-cellular, incorporating many cells, like humans (Miller, 2010:23). Each cell operates in a world of its own, taking in nutrients, converting nutrients to energy, performing their functions, and reproducing as necessary.
5 pages (1250 words) Essay
Eukaryotic and Prokaryotic cells
Light Microscope or Electron Microscopes are used to view these tiny cells. These cells are of many different types, which make the appearance and characteristics distinct from each other. Eukaryotic and Prokaryotic cells are two such cells which have DNA as their generic material.
2 pages (500 words) Essay
Prokaryotic and Eukaryotic Cells
4). Prokaryotic cells are classified as either bacteria or archaea. Another major difference is that eukaryotic cells have most DNA strands contained in a nucleus, whereas prokaryotic cells have circular DNA and do not have a nucleus (Fancher). Eukaryotic cells also have organelles, which are specialized structures that transfer energy that prokaryotic cells do not have (Krough, Ch.
2 pages (500 words) Essay
Genetics and Evolution
This phenomenon is clearly an evolutionary controversy. If phenotypic characters only are taken to be granted for discerning species, there really is no discerning phenotype between these species. This also means there are no clear-cut differentiating phenotypic features between the species of these geographic areas arranged in the form of a ring.
10 pages (2500 words) Essay
Theory of Endosymbiosis
This theory is most efficient in being able to explain the origin of chloroplasts (in this case a photosynthetic prokaryote such as a cyanobacterium would be the endosymbiont) as well as mitochondria (perhaps an aerobic heterotroph). The progenitor of the mitochondria or chloroplast could have gained entry into a host prokaryote as undigested prey or as an internal parasite after which the "arrangement" quickly became mutually beneficial to both partners (the "host" cell and the endosymbiont).
4 pages (1000 words) Essay
Cell molecular biology
Gene expression patterns of the cyclin genes of Tetrahymena are known to both drive and respond to cell cycle events similar to these in other model systems.
5 pages (1250 words) Essay
Cell Structure (Bio slp Mod 1)
Eukaryotic cell, therefore, contain complex structures formed by internal membranes and cytoskeleton whereas, prokaryotic cells are simple with less complex structured organelles. Theorists postulate that prokaryotes
2 pages (500 words) Essay
Within almost all eukaryotic cells the endoplasmic reticulum, Golgi complex and endosomes can be considered as a system, cooperating to deliver secerted material to the cell surface
These membranes perform different functions such as dividing the cell into structural and functional components or organelles (Cooper, 2000). For instance, in the eukaryotes, the compartment in the endomembrane system is composed of
10 pages (2500 words) Essay
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
Get a custom paper written
by a pro under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Your email