The nucleus of an atom contains
a. neutrons and protons.
b. neutrons and electrons.
c. protons and electrons.
d. protons only.
e. neutrons only
A
Biology & Microbiology
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Marine viruses
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A taxon that diverges earlier than the other taxa being considered in cladistic analysis is a(n):
a. clade. b. outgroup. c. shared taxon. d. derived taxon. e. homologous taxon.
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A stable internal environment
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Biology & Microbiology