Crude oils containing ________ are called “sour” and may be naturally corrosive because of ________
a. fermentative bacteria / acid production
b. more than 0.5 percent sulfur / H2S that is present
c. high levels of organic acids / an elevated pH
d. O2 / production of peroxides
Answer: B
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After looking at the figure above, what can be said about productivity in this ecosystem?
A) Nothing can be said based on this information. B) Between 80% and 90% of the energy is lost between most trophic levels. C) Between 10% and 20% of the energy is lost between most trophic levels. D) Productivity increases with each trophic level.
In a temperate zone lake, what should the temperature profile be immediately after the fall overturn?
A. coldest water at the top, 4° C water at the bottom B. warmest water at the top, 4° C water at the bottom C. 4° C water throughout D. 10° C water throughout E. 4° C water at the top, coldest water at the bottom
When does the ? subunit dissociate from RNA polymerase?
A. after promoter clearance B. at the termination of transcription C. immediately after promoter binding D. immediately before promoter binding E. not until the enzyme is degraded
What other information is related to the question? Which information is most useful?
What will be an ideal response?