What is it called when lava cools and hardens? Sometimes magma flows upward and is forced out onto the earth's surface during a volcanic eruption. Magma that reaches the surface of the earth is called lava. When it cools and hardens, it too forms igneous rock. Igneous rock that is formed on the earth's surface is described as extrusive.n:
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Darwin's greatest contribution to science is that he completed the Copernican Revolution by drawing out for biology the notion of nature as a system of matter in motion governed by natural laws. With Darwin's discovery of natural selection, the origin and adaptations of organisms were brought into the realm of science
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I had to do this because your answer choices was wrong
Polyploidy increases the rate of speciation by having different numbers of chromosomes so organisms cannot reproduce with each other. The rate of speciation is mostly rapid 38 thinks that it mark me brainlest because I was first :D
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