The letter “C” in the above figure represents which
teeth?
a. incisors
b. molars
c. canines
d. premolars
e. none of these
Answer: c
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The human elbow is an example of which kind of joint?
a. synovial joint b. cartilaginous joint c. fibrous joint d. non-fibrous joint e. non-synovial joint
“Perception” differs from “sensation” when referring
to a stimulus in a. the type of receptor stimulated. b. understanding the significance of the stimulus. c. the number of receptors that depolarize. d. feeling exactly what is happening at the site. e. responding to the stimulus.
________________ relay commands from the brain and spinal cord to glands and muscle cells.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not an example of symbiotic nitrogen fixation?
A. Anabaenea with a water fern B. Rhizobium with leguminous plants C. Azotobacter with certain photosynthetic protists D. Frankia with woody shrubs