#Question id: 691
#Unit 1. Molecules and their Interaction Relevant to Biology
Roughly how many amino acids are there in one turn of an alpha helix?
#Question id: 5017
#Unit 11. Evolution and Behavior
Arrange these events from earliest to most recent.
1. emission of lava in what is now Siberia at time of Permian extinctions
2. emission of lava that solidified at the same time as iron-bearing terrestrial rocks began to rust
3. emission of lava that solidified at the same time as rusted iron precipitated from seawater
4. emission of lava in what is now India at time of Cretaceous extinctions
#Question id: 4461
#Unit 3. Fundamental Processes
According to some experiments, during initial transcription, the polymerase remains stationary on the promoter, unwinds downstream DNA, and pulls that DNA into itself, which model is this?
#Question id: 11098
#Unit 7. System Physiology – Animal
If the inspiratory reserve volume is 3000 mL, the tidal volume is 500 mL, the expiratory reserve volume is 1000 mL, and the residual volume is 1000 mL, what is the vital capacity?
#Question id: 9173
#Unit 9. Diversity of Life Forms
Use the following figure to answer the question below
In the figure, which number would designate the arctic tundra biome?