Unknown Story
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- I'M GROWING!
- NOOOOOO! YOU'RE SUCKING THE LIFE OUT OF ME!!! PLEASE!!!
- Over Time ...
- MWAHAHAHA! TASTY CELL!!!
- What is happening?Why is a hot dog inside a potato?
- Billions of Years Later...
- This is the process of endosymbiosis. The mitochondria started off as its own cell, and that is why it has its own DNA.
- Here, a prokaryotic cell, represented by a hot dog, is seen to be growing in size. It begins to develop more structure, such as clearly visible free-floating DNA, as represented by the bright yellow stripe. This allows for the later development of organelles when becoming part of a eukaryotic cell. The prokaryotic cell, which makes up a one-celled organism (a prokaryote), has also grown larger from receiving nutrients.
- Oh, wow! Yes, extremely!
- So, the mitochondria has divided, just as a typical cell would do. Fascinating, isn't it?!
- This scene shows a prokaryotic cell, represented by the hot dog, being taken in by a eukaryotic cell, represented by the potato. Here, the long process of endosymbiosis for the evolution of cells into eukaryotic cells containing mitochondria and chloroplasts, which evolved from prokaryotic cells, is at work.
- Is there a third piece to support this theory? Three is a lucky number, you know?
- Yes, of course! Finally, if you look closely, there is a double membrane around each mitochondria. This is just like a cell would have!
- In this scene, the scientist is explaining the endosymbiotic theory to the student. The eukaryotic cell now seems to look like a potato with a hot dog inside, representing a eukaryotic cell with a prokaryotic cell as the mitochondria. This is one piece of evidence for the endosymbiotic theory because the mitochondria has its own DNA, separate from the nuclear DNA in the eukaryote, with the nucleus represented as the tomato. There are other organelles present, but they are not indicated here.
- ????????
- Oh, okay. I finally understand now! Since there is a surrounding double membrane, internally different DNA, and asexual reproduction at work, the mitochondria evolved from a prokaryotic cell!
- One eukaryotic cell, please. And make the mitochondria extra crispy.
- I couldn't have said it better myself!
- In this scene, as the scientist explains the theory to the student, another key piece of evidence for the theory that he provides is that the mitochondria are able to divide by themselves, just as cells themselves would do. Here, this is exemplified by the presence of two hot dogs instead of one now (two mitochondria). This demonstrates that the mitochondria, which are dividing, likely did originate from prokaryotic cells due to their behavior.
- In this discussion, the scientist explains that there is a double membrane around each of the mitochondria. This means that, since one of the membranes came from the host eukaryotic cell, the other membrane must have come from the original prokaryotic cell. This is the third and final piece of evidence for the endosymbiotic theory that the scientist gives to the intellectually eager student.
- The student finally understands the endosymbiotic theory, having learned a great deal since he asked about what process had occurred. Now understanding the endosymbiotic theory and explaining three of its pillars of support, the student has learned from the teacher, now maybe being the teacher himself. Putting all of this together, the scientist wants a eukaryotic cell with an internally cooked mitochondria, confusing the waiter, who does not know the lecture he awaits ...
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