Day 43, Chapter 28, pp. 548 -- 554, Eukaryotic Origins and Diversification

 Endosymbiotic theory (6 minutes)

More endosymbiotic theory (10 minutes)

endomembrane system (4 minutes)

Quiz, pp. 548 -- 554

1.  List the cellular structures and processes that eukaryotic cells developed when protists evolved.

2.  Are prokaryotic cells bigger or smaller than eukaryotic cells, generally?

3.  Do protists have eukaryotic or prokaryotic cells?

4.  Are bacteria eukaryotic or prokarytic?

5.  What is an organelle?

6.  Which eukaryotic organelles probably began as endosymbionts?

7.  Look at the two figures on pages 552 and 553.  They represent two hypotheses for how the kingdoms of bacteria, archaea, and eukaryotes developed.  They differ because in the older hypothesis it was posited that all three branches evolved from a c____________ a______________, while in the newer hypothesis they settled into the three categories after developing from a common c____________ of cells.  Also, the second hypothesis makes heavy use of the idea of t_____________ of g___________ to create diversity.  Darwinian evolution still applies, but the process is more complex than we thought.