Name _____________________________________ Period ____
How we think complex cells evolved - Adam Jacobson
http://ed.ted.com/lessons/how-we-think-complex-cells-evolved-adam-jacobson
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1.
Endosymbiosis can best be described as:
a. Many cells of one type of organism living closely together
b. Two organisms occupying the same type of environment
c. One organism living completely inside another organism
d. How a multicellular organism uses cell division to grow
2. The endosymbiotic theory explains how organelles inside eukaryotic cells are descended from
ancient _____
a. Unicellular prokaryotic organisms
b. Unicellular eukaryotic organisms
c. Multicellular prokaryotic organisms
d. Multicellular eukaryotic organisms
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3.
New mitochondria inside eukaryotic cells are produced by:
a. Expression of mitochondria genes in the DNA stored in the cell's nucleus
b. Constantly absorbing prokaryotic cells that break down sugar using oxygen
c. The dividing of mitochondria already present in the cell
d. The chloroplasts of the cell
4. Chloroplasts in a eukaryotic cell have both an inner and outer membrane. The inner membrane
of chloroplasts is similar to:
a. The membrane surrounding the whole eukaryotic cell
b. The inner membrane of the mitochondria in that cell
c. The membrane of an ancient organism that absorbed other organisms
d. The membrane of an ancient prokaryotic organism that could perform photosynthesis
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5.
The endosymbiotic theory provides a way to explain the complexity of
eukaryotic cells. This explanation is based on:
a. How simpler organisms combine their different abilities to live together
b. The way a complex organism can become dominant over simple organisms
c. Small organisms invading and destroying larger host cells
d. Using different arrangements of membranes to produce energy
6. What types of biological abilities can be combined to create more capable, more complex
cells?
7. How does the presence of different types of ribosomes inside a eukaryotic cell strengthen the
endosymbiotic theory?
8. Describe in your own words how chloroplasts and mitochondria found within a cell have two
membranes.