Oxygen (O2) ________.
A. is of no use whatsoever to any organism in the euphotic zone
B. is not affected by photosynthesis
C. is typically found in the lowest concentrations where photosynthesis takes place
D. All of these are correct
E. None of these is correct
Answer: E
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Water is a key factor in slope stability
a. True b. False
Vegetation may
A. increase slope stability by taking up moisture. B. increase slope stability because roots help hold soil in place. C. decrease slope stability by adding weight. D. Any one of the scenarios.
The role of the World Trade Organization (WTO) is to
A. prevent war B. defend against Communism C. help members protect their industries from competition D. increase world trade by reducing import and export duties
Which of the following represents a type of mutualism?
A) A large herd of zebra graze lazily across the broad savannah. B) A red-tailed hawk pounces on a field mouse for dinner. C) A honeybee pollinates an orange blossom as it feeds on the flower's nectar. D) A mosquito draws a blood meal from the back of an elk.