Instructions

What does an analysis of Earth’s global energy budget indicate about the global climate system?
A. It’s currently in equilibrium, radiating as much energy from the top of the atmosphere as it absorbs.

B. It’s currently in equilibrium, radiating more energy from the top of the atmosphere than it absorbs.

C. It’s currently out of equilibrium, radiating more energy from the top of the atmosphere than it absorbs.

D. It’s currently out of equilibrium, radiating less energy from the top of the atmosphere than it absorbs.

Q5.29. Even if the snowshoe hares described in the previous question are unable to shift the timing of their molts (coat color changes), individuals could reduce predation risk by choosing to be in spots where the background color matches their current coat color. This is an example of which of the following?
A. A species range shift

B. A physiological change

C. Behavioral acclimation

D. Evolution by natural selection

Q3.24. How much the observed nitrogen fluxes did the corn/forest ecosystem retain each year? (Hint: The focus of this study is on the measured, anthropogenic inputs displayed in the budget.)
Answer in kg ha-1  y-1

Q3.25. Which of the following was not an important nitrogen retention mechanism in this agricultural ecosystem?

ACorn harvest

BDenitrification

CFertilizer application

D Accumulation in the system (positive storage)

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