Controlled experiments are those that:
A. are most often used in ecological research.
B. require only a few replications because everything is rigorously controlled.
C. are performed in controlled environments such as greenhouses and growth chambers.
D. have an outcome that is only influenced by the factor being studied.
Answer: D
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Fill in the blank(s) with correct word
____________________ classes are competitive events at horse shows in which judges evaluate horses based on the jobs they will be performing.
Fill in the blank(s) with the appropriate word(s).
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Following are the results of a sieve analysis:
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Why would a preheat coil be used on the energy-recovery wheel?
A) to prevent moisture transfer to the supply air B) to prevent frost from forming on the wheel C) to warm the exhaust air D) to dry the intake air