Which element, by mass, is most abundant in the human body?
A) carbon
B) oxygen
C) hydrogen
D) nitrogen
E) calcium
Correct Answer:
Verified
Q5: Cell membranes are formed by _
A)a lipid
Q6: The ion found in chlorophyll is _
A)Zn2+
B)Mg2+
C)Ca2+
D)Fe2+
E)Cu2+
Q7: Magnesium is found in which one of
Q8: Which of the following elements, by mass,
Q9: The concentration of a major essential
Q11: Which element, by the number of atoms,
Q12: Which anion is most abundant in the
Q13: The Mg2+ ion plays a significant role
Q14: The concentration of a trace essential
Q15: An essential biological element _
A)is any element
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