#Question id: 5004
#Unit 11. Evolution and Behavior
Pax-6 usually causes the production of a type of light-receptor pigments. In vertebrate eyes, though, a different gene (the rh gene family) is responsible for the light-receptor pigments of the retina. The rh gene, like Pax-6, is ancient. In the marine ragworm, for example, the rh gene causes production of c-opsin, which helps regulate the wormʹs biological clock. Which of these most likely accounts for vertebrate vision?
#Question id: 682
#Unit 1. Molecules and their Interaction Relevant to Biology
The principle forces holding subunits of an oligomeric protein to each other are ________.
#Question id: 12918
#Unit 13. Methods in Biology
#Question id: 11084
#Unit 7. System Physiology – Animal
The next diagram shows two lung units (S and T) with their blood supplies. Lung unit S has an ideal relationship between blood flow and ventilation. Lung unit T has a comprised blood flow. What is the relationship between alveolar dead space (DALV), physiologic dead space (DPHY) and anatomic dead space (DANAT) for these lung units?
#Question id: 9570
#Unit 10. Ecological Principles