One of the first uses of genetic engineering was the manufacture of which drug?
a. Penicillin c. Aspirin
b. Insulin d. A flu vaccine
B
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Which of the following statements is true regarding water used in mortar?
A. It should be high in alkalis but low in salts. B. It should be high in both salts and acids. C. Purifying chemicals in city water supplies have an adverse effect on mortar. D. Water fit to drink is acceptable for use in mortar.
In colder months and during molting periods, chickens need more _____ in their diets
a. protein b. fat c. carbohydrates d. roughage
When do positive shutoff fittings reduce refrigerant loss?
A) Only when connecting hoses B) When fixing broken hoses C) Only when disconnecting hoses D) When connecting and disconnecting hoses
The abbreviation for malleable iron is ____________________.
Fill in the blank(s) with the appropriate word(s).