Week 2, Biochemistry & Structure of Living Cells. Select one of the following discussion topics for your primary post, which should address the discussion question in at least 125 words.

Discussion Topic 1: Research Carl Woese. Carl Woese (1928 – 2012) was an American scientist who was renowned for “discovering the third domain of life”. He did so by analyzing a particular molecule from many different organisms. Research his activities on the internet, and then address issues (a), (b) and (c), that are given below, and cite your source(s).

  • (a) Which molecule did Woese analyze?
  • (b) Explain how the results supported the existence of a “third domain” of life.
  • (c) Describe one way that this relates to this week’s lesson.
  • Don’t forget to cite your source or sources.

Discussion Topic 2: Chemicals of Life. Watch Dr. Cox’s video on the “Chemicals of Life” in the “Instructor Insights” area of Week 2. Then, answer questions (a) and (b).

  • (a) Describe three things you learned from this video.
  • (b) Describe at least one way that this video relates to this week’s lesson.
  • To get credit for this topic, your post must be based on the video.

Discussion Topic 3: Lokiarchaeum. Read at least one of the two articles about Lokiarcheum (Yong, 2015; Zimmer, 2015). Both articles describe recently discovered evidence about a previously unknown organism. Address issues (a), (b) and (c), that are given below, and cite your source(s)

  • (a) Describe the evidence which suggests that Lokiarchaeum may be a “transitional form” between archaea and eukarya.
  • (b) What are the implications of the existence of a transitional form like this?
  • (c) Describe one way that this relates to this week’s lesson.
  • Cite whichever article you use. If you use both, cite them both. There’s no particular reason why you should need any other source, but if you do use any other source, you must cite it, too.


Cox, J. F. (2016). The chemicals of life – revised. [Video]. Retrieved from this course shell.

Yong, E. (2015, May 06). New Loki microbe is closest relative to all complex life. [Blog post]. Retrieved from http://phenomena.nationalgeographic.com/2015/05/06…

Zimmer, C. (2015, May 6). Under the sea, a missing link in the evolution of complex cells. The New York Times. Retrieved from http://www.nytimes.com/2015/05/07/science/under-th…

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