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Answer:
one motor neuron
Explanation:
Although a single motor neuron can innervate several muscle fibers, each muscle fiber is innervated by only one motor neuron
The asthenosphere lies 80-200km below the surface under the lithosphere. Convection also occurs in the asthenosphere. The asthenosphere is mostly made of up rock material (magnesium and iron silicates). The asthenosphere makes up 6% of the mantle and lets the lithosphere move.
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both species had growth in number within the same time period
