The smallest quantity of an element that retains the properties of the element is a(n) :
A) neutron.
B) atom.
C) proton.
D) electron.
Correct Answer:
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Q49: Which of the following refers to layers
Q50: Myelin is produced by:
A)oligodendroglia and Schwann cells.
B)oligodendroglia
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A)Golgi bodies.
B)lysosomes.
C)microtubules.
D)endoplasmic reticulum.
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A)In
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Q57: The cell membrane is important because it:
A)controls
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