12C, 13C, and 14C are all isotopes of carbon. They differ in their
a. overall charges.
b. number of electrons.
c. number of protons.
d. number of neutrons.
e. electron energy shells.
D
Biology & Microbiology
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A polymorphism is defined as all the changes we would see in 50 randomly chosen
A. true B. false
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A marine reptile found only on the Galapagos Islands is:
a. the sea snake. b. the marine crocodile. c. the marine iguana. d. the flatback sea turtle. e. the Galapagos skink.
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The urethra ________.
A. is a structure where semen is stored B. adds fluids to semen C. is where sperms are produced D. is a tube that conveys both urine and semen
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