Which of the following is true of chemical bonds?
A) Electrons are always shared.
B) Electrons can be shared or completely transferred.
C) Chemical bonds cannot occur between two identical atoms.
D) Atoms can achieve a higher energy state and less stability by forming bonds.
Answer: B
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a. the small roots in the root systems of trees b. endosymbiotic bacteria associated with plant roots c. fungus and root mutualistic associations d. parasitic fungal infections of tree roots e. endosymbiotic fungal cells associated with leaves
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