most organ systems are innervated by both the sympathetic and parasympathetic nervous systems, a feature known as dual innervation. Why is this a useful adaptation

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convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

protistas excret ethanol used in the manufacture of vinegar