Which cellular process is the main contributor to genetic variation? A.
independent assortment during meiosis

B.
cytokinesis at the end of mitosis

C.
production of a duplicate DNA strand

D.
asexual reproduction

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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answer:

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.