Endosymbiosis:

*Definition- organism living inside another organism. (both function as one organism together.)

HOW WAS IT DISCOVERED?? BY WHO??

- In the 1960's, biologist Lynn Margulis, promoted the endosymbiosis theory. In 1981 he published a book titled "Symbiosis in Cell Evolution." At first, biologist didn't agree with him but over time and lots of studies, he was agreed with.

THE THEORY:

- Mitochondrion came from little heterotrophic prokaryotes that were engulfed with bigger eukaryotic cells. The prokaryote used respiration to make organic molecules into energy. The prokaryotic cells that were too small to be digested started to live inside the Eukaryotic, becoming dependent on the cell for organic molecules and inorganic compounds. Since mitochondria have their own DNA, RNA, and ribosomes, helps the endosymbiosis theory, so does amoeba, a eukaryotic organism that does not have enough mitochondria, so requires a symbiotic relationship with a aerobic bacteruim.

-4 REAL LIFE EXAMPLES OF ENDOSYMBIOSIS:
1. amoeba and bacteria populations have been said to contain endosymbiosis, however, noone has ever actually observed it. The prokaryotes engulf each other to form "relationships" in which they are suppose to work better together.
2. Unicelllar algae called cryptomonads seem to engulf a red algae by endocytosis.
3. Another unicellular algae called chlorarachniophytes engulf a green algae.
4. Also, sponges, sea anemones, planarians, and clams contain algae in their cells.


~MY OPPINION~
I believe that we should continue to study this because we do not fully understand it yet.. If we continue studying and observeing it then we could always discover things that we didnt know.. It could help our understanding of algae and more ocean or land animals who are involved with endosymbiosis. You can never completely understand anything until you know that you have disected every angel of it.





Links:
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/S/Symbiosis.html#Mutualism
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/E/Endosymbiosis.html
http://ca.answers.yahoo.com/question/index?qid=20100322191252AAOK7iX
http://endosymbionts.blogspot.com/

WORDS:
305-310