Poison ivy reacts to low sunlight by
a. developing additional roots.
b. flowering more often.
c. increasing leaf size.
d. increasing stem growth.
D
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NAD+ contains the B vitamin ________ as part of its structure, whereas FAD contains another B vitamin, ________, as part of its structure.
Fill in the blank(s) with the appropriate word(s).
What is the purpose of cyclic electron flow?
a. to prevent the formation of NADPH and excessive reactive oxygen species b. to prevent the loss of light energy when the ATP production pathway is saturated c. to ensure that all of the energy harvested by the sun is converted into ATP d. to protect the cell when CO2 is unavailable and the Calvin cycle is not operating e. to increase the net production of ATP in times when CO2 is unavailable
What is the leading cause of the acceleration in the growth rate of the human species?
a. K-selection b. R-selection c. technological advances d. disease
Which of the following is (are) a factor(s)
determining community structure? a. species interactions b. species adaptations c. climate and topography d. seasonal resource availability e. all of these