One of the disadvantages of the C4 pathway is that it requires
A. more O2.
B. more NADPH.
C. more light.
D. more ATP.
E. a much higher temperature.
D. more ATP.
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The aquatic plant Elodea is commonly used to study photosynthesis. You put some Elodea in a test tube filled with water containing radiolabeled oxygen (18O), shine light on the test tube, and measure the rate of photosynthesis by counting oxygen bubbles released. At the end of your experiment, you would find the most 18O in
A. glucose. B. carbon dioxide. C. O2. D. in water for the most part, as water is not used in photosynthesis. E. in ATP.
Which structure is found in every cell?
a. Chloroplast b. Cell wall c. Nucleus d. Plasma membrane e. Central vacuole
All of the following organisms are chelicerates except ________
a. horseshoe crabs b. spiders c. lobsters d. ticks
Darwin's assumption that living forms must be descended from extinct forms was based on ________ evidence.
A. anatomical B. biogeographical C. fossil D. biochemical