____ septic systems mechanically inject air into a waste collection tank, encouraging decomposition, which provides a higher quality effluent.

A. Mechanical
B. Injection
C. Anaerobic
D. Aerobic


Answer: D

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Flared and compression fittings should be ordered by their _____ dimensions.

a. OD b. ID c. circumference d. radius

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By definition, a stem cell is one used to:

a. Clone plants c. Create a zygote b. Start differentiation d. Serve a worker role

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When both change and complexity are low, which of the following is true?

a. uncertainty is also low b. System 4 designs are best c. organic designs work best. d. All of these are correct. e. None of these are correct.

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The first breed of horses developed in the United States was the

A. Mustang B. Arabian C. Quarter Horse D. Morgan E. Appaloosa

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