When the isotope 14C undergoes radioactive decay, a neutron splits into an electron and a proton, with ejection of the
electron. This decay produces an atom of ____.
a. iron
b. carbon
c. hydrogen
d. oxygen
e. nitrogen
ANSWER: e
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The term complex as used in the Mycobacterium tuberculosis complex:
a. means that the identification of the organ-ism is complex and is only performed in large reference laboratories. b. is used to describe two or more species whose distinction is complicated and of little or no medical importance. c. refers to a set of organisms that are genet-ically indistinguishable but are phenotyp-ically different. d. refers to different subtypes of the bacteria M. tuberculosis.
This animal has two atria and two ventricles and two vascular circuits. This animal is a(n) ____
a. mountain bluebird b. fire-bellied toad c. trout d. lobster e. cod
What fraction of your DNA is the same as every other human being?
a. 50% b. 75% c. 90% d. 95% e. 99%
If the first living thing was produced on Earth,
A. it was produced in the atmosphere. B. it was an aerobic heterotroph. C. spontaneous generation occurred. D. None of these answers is correct.