The pH scale measures the
a. hydroxide ion concentration.
b. concentration of a water-based solution.
c. hydrogen ion concentration.
d. number of water molecules in a solution.
e. concentration of dissolved solute.
C
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A. hepatitis C virus B. influenza A virus C. HIV D. herpes simplex virus E. respiratory syncytial virus
The biosphere is defined as the portion of _____ where life exists.
A. the earth B. the atmosphere C. the ocean D. land on Earth E. fresh and salt water
In __________ speciation, a population forms a new species within the same geographical region as
the original species. a. allopatric b. sympatric c. heterogeneous d. autologous e. parapatric
The teeth in the very front of your mouth are incisors
____________________ Indicate whether the statement is true or false.