_____________ describes a relationship between animals in which one benefits and the other is not harmed
a. Parasitism c. Mutualism
b. Commensalism d. Saprophytism
B
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?When a mass suspended from a test sample causes the sample to change shape over a period of time, the strain is called ____.
A. ?fatigue B. ?stress C. ?tension D. ?creep
Answer the following statement(s) true (T) or false (F)
1. Maximizing the energy efficiency of an HVAC system means controlling two factors: the area (volume of air) in the home that the system must heat and cool, and the temperature level to which the system must heat or cool that area. 2. Air duct leaks are usually easy to detect. 3. Room air conditioners do not work well in confined, well insulated spaces. 4. The two main types of space heaters are defined by their method of transferring heat. 5. Most residential water heaters in the U.S. are tanks ranging in size from 5-20 gallons.
The travel of a piping offset that has a run of 15 inches and an angle of 45 degrees is _____ inches. (Refer to the figure above.)
a. 19.4 b. 21.2 c. 23 d. 25.7
Human-made fibers are more comfortable than fibers produced by agriculture
Indicate whether the statement is true or false