#Question id: 20542
#Unit 12. Applied Biology
#Question id: 974
#Unit 1. Molecules and their Interaction Relevant to Biology
What is the source of the N-1 atom during de novo biosynthesis of purines?
#Question id: 5032
#Unit 11. Evolution and Behavior
There is still some controversy among biologists about whether Neanderthals should be placed within the same species as modern humans, or into a separate species of their own. Most DNA sequence data analyzed so far indicate that there was probably little or no gene flow between Neanderthals and Homo sapiens. Which species concept is most applicable in this example?
#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: 8955
#Unit 9. Diversity of Life Forms