A(n) ________ is a stream maintain an equilibrium between the processes of erosion and deposition and, therefore degradation and aggradation
A) graded stream
B) oxbow
C) anabranching river
D) meandering stream
A
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Which of the following pairs of change-of-state processes bypass the liquid state of water?
A) freezing and melting B) sublimation and deposition C) evaporation and condensation D) none of the above
During the light reactions of photosynthesis, the solar energy absorbed by chlorophyll is used to ________
A) split water molecules and release oxygen in the form of O2 B) defend against predators C) produce small, high-energy molecules that are used in the Calvin cycle to manufacture sugars D) break down macromolecules such as starch E) Both A and C
Peasant agriculture is practices extensively in which region?
A) South Asia B) Southeast Asia C) East Asia D) East Africa E) all of the above
What is the main problem that has developed in the Ogallala aquifer?
A. Precipitation is heavier to the east, causing tilting of the entire formation. B. It has become contaminated with radioactive waste from the Chernobyl accident. C. Overpumping may cause southern parts of the aquifer to go dry in the next 100 years. D. None of these choices are correct.