Covalent bonds form when
A. atomic nuclei fuse.
B. electrons are shared between two atoms.
C. neutrons are transferred from one atom to another.
D. molecules become ionized.
E. protons are lost from atoms.
B
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The blood pigment ________ imparts a pinkish hue to the skin.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements regarding the brainstem is correct?
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