Uses of chlorofluorocarbons include all of the following EXCEPT for ____

a. gasoline additives
b. air conditioner coolants
c. refrigeration coolants
d. plastic packaging
e. solvents


ANSWER: a

Biology & Microbiology

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A karyotype is a technique by which a researcher can see and count chromosomes

A. true B. false

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When fats are broken down as energy sources, their components enter ____

a. glycolysis b. the Krebs cycle c. electron transport d. glycolysis and the Krebs cycle e. glycolysis and electron transport

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A faster-than-normal heart rate is called:

a. brachycardia b. atrial fibrillation c. tachycardia d. ventricular fibrillation e. stroke

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Hawthorn maggot flies that breed on native hawthorns or introduced European apples can mate in the lab, but rarely mate in the wild. This is an example of _____ reproductive isolation.

A. postzygotic B. prezygotic C. allopatric D. sympatric E. outgroup

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