A motor nerve and all the fibers that it controls is called a:
What will be an ideal response?
Motor unit
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The ability to determine where a sound is coming from depends primarily on
A. differences in sound intensity in the two ears. B. differences in time of sound arrival to the two ears. C. differences in sound frequency received at the two ears. D. differences in both frequency and intensity at the two ears. E. None of these choices are correct.
Which process is performed by bacteria in mutualistic relationships with legumes?
a. ammonification b. biological magnification c. denitrification d. nitrification e. nitrogen fixation
Which of the following experimental procedures would most likely reduce transpiration while allowing the normal growth of a plant?
A) subjecting the leaves of the plant to a partial vacuum B) increasing the level of carbon dioxide around the plant C) putting the plant in drier soil D) decreasing the relative humidity around the plant
The valence of an atom represents its
A) ability to interact with other atoms. B) electronegativity. C) radioactivity. D) ability to attract electrons. E) ability to interact with water.