Pit vipers are the only known vertebrates with an ability to detect a certain type of stimulus. What can these snakes sense?
A. infrared radiation
B. ultraviolet radiation
C. microwave radiation
D. visible light radiation
E. none of these
A. infrared radiation
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Motor proteins require energy in the form of ATP. ATP hydrolysis results in a conformational change that allows the protein to move along microtubular tracks (pathways). What structural component of the motor protein contains the ATP binding site
and, therefore, changes shape to enable movement? A) the portion of the molecule that binds to the vesicle being transported B) the stalk C) the portion of the molecule that binds to the microtubular track along which the vesicle is being transported D) a location midway between the vesicle binding site and the portion of the molecule that binds to microtubular tracks
Tetanus prevents the release of neurotransmitters from
A. muscle cells. B. excitatory neurons. C. inhibitory neurons. D. tetano cells.
Isotopes of the same element differ from each other in the number of
a. electrons and protons. b. neutrons only. c. protons and neutrons. d. electrons only. e. protons, neutrons, and electrons.
What does the word "trophic" mean?
A. energy B. biomass C. feeding D. web E. niche