- If the pH of the ocean on a certain planet is 8.35, then what is the concentration of H+ in the water?
- 4.47x10^-9 moles/liter
- 3.07x10^-3 moles/liter
- 2.38x10^-4 moles/liter
- 8.35 moles/liter
- If the concentration of H+ in the ocean of a certain planet is 2.51 x 10-9, then what is the pH?
- 8.5
- 8.55
- 8.6
- 8.65
- If the partial pressure of oxygen is 20 mm Hg, then what is the percent saturation?
- 15%
- 20%
- 25%
- 30%
- Suppose the oxygen saturation of hemoglobin (oxyhemoglobin) is 60%. What is the partial pressure?
- 25 mm Hg
- 30 mm Hg
- 85 mm Hg
- 90 mm Hg
- The plant species of the planet Ralinius (created by Brian
Cannon for BIOL 103) were mapped by DNA sequence comparison. The following
table shows the percent similarity for all pairs of plant species.
Assuming that mutations accumulate at 0.5% per million years, draw a
phylogenetic tree of these species.
-
- How would you find the root of the Ralinius tree?
- Find a species that is closely related to the species on the upper branch of the tree.
- Find a species that is closely related to the species on the lower branch of the tree.
- Find a species that is distantly related to all of the species on the tree.
- Find a species that is closely related to all of the species on the tree.
- According to the correct phylogenetic tree from question 5, about how long ago did ocean grass and yumps diverge?
- 25 million years
- 50 million years
- 70 million years
- 75 million years
