What are some possible explanations for your results? If you had unexpected

results, what might have happened to contaminate your samples of potato?
(Hint: Is the raw milk the only source of bacteria in the experiment?)



What will be an ideal response?


Bacteria are present on all surfaces and in the air. The untreated potato could have
been contaminated very easily from any of these other sources.

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In split phase motors, the centrifugal switch is operated by springloaded ____________________.

Fill in the blank(s) with the appropriate word(s).

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Cuando se combina el gas acetileno con oxígeno durante actividades de corte oxigás, el acetileno hace que la llama arda a más de _____ grados Fahrenheit.

a. 2,500 b. 3,500 c. 4,500 d. 5,500

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About how long does salmonellosis usually last?

A) about 24 hours B) 2-5 days C) 4-7 days D) up to two weeks

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Lumber inspection criteria are defined by _____

a) the building supply company that sells it b) the carpenter who buys it c) the U.S. Department of Commerce d) the architect

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