23. Which of the following would be most significant in understanding the structure of an ecological...
The Shannon diversity index is more useful than just a list of present species because... a. It factors biomass into the index b. It accounts for relative abundance and richness c. It only factors species that are numerous enough to have a community level effect d. It excludes microbes which tend to complicate diversity analysis e. It calculates the exact number of species found in the habitat.
Capital structure decisions include which of the following?1. Deciding when to repay long-term debt.II. Deciding how funds are distributed to the various divisions of the company.III. Evaluating the costs of issuing debt and equity.IV. Determining the appropriate level of net working capital.Select one:a. II only.b. I and III.C. II and IV.d. I, II, and III.e. I only.
Which of the following explanations account for the fact that ecological efficiencies tend to be higher in aquatic ecosystems than in terrestrial ecosystems? I. Most aquatic organisms are cold-blooded II. The oxygen concentration is much lower in water than in air III. Temperatures vary much less in aquatic systems than in terrestrial systems IV. It takes less energy to support body weight in water than on land or in the air I and II a) b) Il and III c)...
13. Which structure is most consistent with the following IR spectrum? 100 TRANSMITTANCE [%] 50 0 4000 3000 1000 500 2000 1500 WAVENUMBER (-1) ОН OH Н 11 III IV a. I b. II c. III d. IV e. V
5. Which of the following would you expect to have significant resonance stabilization energy? a) I b) II c) III d) all three of them I II IL e) II and III Z -I z 6. Of the following C-10 compounds, which is expected to possess the greatest resonance (delocalization) energy? II III IV 7. Which of the following would you expect to be antiaromatic? v I III IV e 9. Which of the following would NOT be aromatic? II...
19. What would be the major product(s) of the following reaction? Br EtOH 20 °C OEt IV C) I and III A) I and II D) IV B) II and III E) None of these choices. 20. Give a detailed reaction mechanism for the reaction expected to occur when 2-bromo- methylpentane is heated with methanol. Draw clear structural formulas of all relevant species and use curved arrows to represent electron flow. Also indicate which step is likely to be rate-...
18) Which of the following are key inputs to determining the current value of an asset? I. the required rate of return II. future cash flows III. current stock price IV. timing of future cash flows A) I and III only B) II, III and IV only C) I and II only D) I, II and IV only
Need help understanding why? Thanks! 9. Rank the following from most to least acidic CI COOH COOH coOH COOH IV A. I II III >IV B. II I IV> III C. III IV II > I D. IV III I > II E. III IV I II 10. Which hydrogen is the most acidic in the molecule shown below? C A 11. Why are ketones less reactive than aldehydes? A. Ketones are less sterically hindered. B. Carbonyl carbon of ketones...
Which of the following compounds would you expect to be antiaromatic? (i) cyclooctatetraene (ii) 1,3-cyclooctadiene (iii) cyclooctatetraenyl dianion (iv) 1-ethenylcyclooctatetraene (v) 1,3,5,7-octatetraene Select one: a. i only b. i, ii, iv and v only c. iii only d. i and iv only e. all the above From my working I found i, ii, iv, and v to be non aromatic and iii to be aromatic. Is non aromatic the same as antiaromatic?
12. Which of the following is/are correct resonance structure(s) for compound A? A) III and IV B) I and II C) I and IV D) II and III E) I and III