Uses of chlorofluorocarbons (CFCs) include all
EXCEPT which of the following?
a. gasoline additives
b. aerosol propellants
c. refrigeration coolants
d. manufacture of plastic foam
e. components of solvents
Answer: a
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Sclereids are cells that:a
are found in wood and bark. b. conduct water and dissolved minerals. c. are usually found in nut shells and pits of stone fruits. d. conduct dissolved sugars. e. form cytoplasmic connections between cells.
An example of a prokaryotic organism is
A. bacteria. B. protozoa. C. moss. D. fern.
Mutations resulting from exposure to physical or chemical agents are called ________ mutations.
Fill in the blank(s) with the appropriate word(s).
Each of the following is a model for membrane structure except
A) Overton lipid coat. B) Langmuir monolayer. C) Gorter and Grendel bilayer. D) Singer and Nicholson fluid mosaic. E) Watson and Crick double helix.