Which of the following is the source of electrons for the light reactions?
A) C6H12O6
B) CO2
C) NADPH
D) H2O
D
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Recall that, through respiration, organisms release the energy contained in organic compounds. This energy, in turn:
A. increases as it moves through the upper levels of a trophic pyramid. B. increases as it moves through the upper levels of a food web. C. moves in a bi-directional manner between the levels of a food web. D. moves in a bi-directional manner between the levels of a trophic pyramid. E. decreases as it moves through the upper levels of a trophic pyramid. F. decreases as it moves through the upper levels of a food web.
In what type of environment would you expect to find a plant that spends most of its resources on defenses, rather than growth? Select all correct choices
A. in the nutrient-poor soil of a tundra B. in the clay soil of a rainforest C. on well-fertilized farmland D. in the sandy soil of a rainforest
Energy released by the electron transport chain is used to pump H+ ions into which location?
A. cytosol B. mitochondrial outer membrane C. mitochondrial inner membrane D. mitochondrial intermembrane space E. mitochondrial matrix
At rest, veins hold about ____ percent of the body’s blood
a. 40 b. 50 c. 60 d. 70 e. 80