Examlex
Which of these is the best description of a virus?
Dikes
Vertical or steeply inclined sheet-like bodies of igneous rock that cut through sedimentary rock layers.
Intrusive Rock
Igneous rock formed from magma that cools and solidifies within the crust of the planet, creating large crystal grains.
Extrusive Rock
Igneous rock that forms on the Earth's surface as lava cools and solidifies.
Igneous Rock
Stone created by magma or lava hardening as it cools.
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