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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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Answer:
This is considered as the study of homology.
Explanation:
Homology, studies the comparable characteristics of the physiology, structure or development of various species based on their decent from a similar evolutionary ancestor.
