5 February 2012, 9:01 am
15. Mallory has four aquatic plants of the same size and species. She submerges each plant in a separate beaker filled with 200 mL of water. She then sets each beaker under a different intensity of light. Mallory observes that, of the four plants, the plant in the beaker under the most intense light gives off the most gas bubbles in a 20 min period. Which of the following statements best explains Mallory’s observations? A. Cells decompose most quickly under the most intense light. B. Water evaporates from plants fastest under the most intense light. C. Photosynthesis occurs at the highest rate under the most intense light. D. Gases in the leaves of plants expand most under the most intense light. 16. Which of the following processes releases primarily oxygen into the atmosphere? A. combustion B. osmosis C. photosynthesis D. respiration 17. The diagram at right shows part of the carbon cycle. If many trees are removed from a forest by logging, what is the most immediate effect on the carbon cycle in that forest? A. increased rates of decomposition B. decreased use of atmospheric CO2 C. decreased combustion of fossil fuels D. increased production of organic compounds... Read More »
Share on del.icio.us
Share on digg
Share on Technorati
Share on reddit
Share on Yahoo!
Share on Facebook