#Question id: 11395
#Unit 9. Diversity of Life Forms
Mitochondria are thought to be the descendants of certain alpha -proteobacteria. They are, however, no longer able to lead independent lives because most
genes originally present on their chromosome have moved to the nuclear genome. Which phenomenon accounts for the movement of these genes?
#Question id: 11396
#Unit 9. Diversity of Life Forms
Carl Woese and collaborators identified two major branches of prokaryotic evolution. What was the basis for dividing prokaryotes into two domains?
#Question id: 11397
#Unit 9. Diversity of Life Forms
Which statement about the domain Archaea is false?
#Question id: 11398
#Unit 9. Diversity of Life Forms
Assuming that each of these possesses a cell wall, which prokaryotes should be expected to be most strongly resistant to plasmolysis in hypertonic environments?
#Question id: 11399
#Unit 9. Diversity of Life Forms
The thermoacidophile, Sulfolobus acidocaldarius lacks peptidoglycan. What is likely to be true of this species?
1. It is a bacterium.
2. It is an archaean.
3. The optimal pH of its enzymes will lie above pH 7.
4. The optimal pH of its enzymes will lie below pH 7.
5. It could inhabit certain hydrothermal springs.
6. It could inhabit alkaline hot springs.
#Question id: 11400
#Unit 9. Diversity of Life Forms
What is the primary ecological role of prokaryotes?