Squid benefit from having axons of multiple sizes that innervate their muscle fibers in the mantle because
A) Squid need larger diameter axons to innervate larger groups of fibers.
B) The larger diameter axons innervate fibers that are farther away because the signals are conducted more rapidly through them.
C) Smaller fibers are not energetically efficient.
D) Larger fibers generate larger action potentials, which allows for more neurotransmitter release.
Answer: B
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