Scientists believe that whale ancestors had individual toes and not fins, but lived near water. Using your knowledge of mutations and natural selection, develop an argument for how mutations could result in webbed toes or fins in whales.

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the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.