Plants evolved from green algae approximately _____ million years ago.
a) 400
b) 3,500
c) 2,200
d) 130
e) 475
Answer: e) 475
Biology & Microbiology
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A. IgA B. IgE C. IgM D. IgG E. IgD
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A) buffer B) isotope C) salt D) stereoisomer E) functional group
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Indicate whether the statement is true or false
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