Endosymbiotic Theory

Uncover the fascinating origins of complex cells! Learn about the endosymbiotic theory and cellular evolution.

1. What does endosymbiosis (the word itself) actually mean?2. Where did the first mitochondria and chloroplast originate from?3. How do some species of coral in our oceans show real evidence of symbiosis? Explain the symbiotic relationship of the coral. Watch the following video then answer the following 3 questions: CLICK HERE 4. What are the two main types of cells? How are they similar and how are they different?5. What does it mean to “engulf” something? What type of cell was engulfing what other type of cell in endosymbiotic theory?6. What cellular organelles have their own unique DNA? Watch this second video and answer the following 3 questions:CLICK HERE 7. Remember, earth is approximately 4.5 billion years old. It is believed that earth’s early atmosphere did not contain oxygen. Approximately 2.3 billion years ago, the great oxidation event occurred; and the oxygen levels increased. How is the first hypothesis of endosymbiotic theory related to this evidence?8. What energy advantage do autotrophs have over heterotrophs? How does this support the second hypothesis of endosymbiotic theory? Provide one piece of evidence for this claim.9. In your own words, describe the endosymbiotic theory diagram Figure 19-18 below. Read the passages and observe the diagram below then answer the following questions: