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Endosymbiosis Case Study
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Endosymbiosis Case Study

Part A: Three World Changing Biology Experiments

How do biologists know what they know? Remember, the whole world can change from just one wild ideas. Watch Three World Changing Biology Experiments and answer the following questions.

  1. Which experiment confirmed that cells can only come from preexisting cells?
  1. Describe the evidence presented from the experiment.
  2. Why was this experiment important to science?

  1. Which experiment provided evidence to support the notion that the first cells arose from nonliving material?
  1. Describe the evidence presented from the experiment.
  2. Why was this experiment important to science?

Part B: Endosymbiosis Case Study

The word symbiosis literally means the “living together more or less intimate association or close union of two dissimilar organisms” according to the Merriam-Webster Online Dictionary.  Endo refers to internal, and thus endosymbiosis refers to an internal “living together” within a single organism.  The process of endosymbiosis is observed often in biology, for example a variety of marine coral species hold bacteria species that photosynthesize and thus provide energy for the coral; this is only one example of many examples.  

In this case study you will examine the concept of endosymbiosis and the concepts connection to the development of eukaryotic cells.  The case study is provided by UC Berkeley which can be found here.

You can also watch this helpful video.

   3. Describe symbiosis:

   4. Name and briefly describe the three  Domains of life.

   5. Draw a diagram to summarize endosymbiosis

   6. Describe three types of evidence for Eukaryotes forming by endosymbiosis

Membranes:

DNA:

Reproduction:

    7. What does the evidence suggest for the presence of chloroplast in some cells but not in others?

Part B: McGraw-Hill Endosymbiosis Animation

    8. What type of transport does the development of Eukaryotes by endosymbiosis represent?

   9. What does the animation provide as evidence for endosymbiosis?

   10. Where does the animation suggest mitochondria and chloroplasts were derived from?