A quote often attributed to Mark Twain states, "What gets us into trouble is not what we don't know. It's what we know for sure that just ain't so." How does this relate to Pangaea and the Theory of Plate Tectonics? Ted talk

the answer is: metamorphic rocks often show the presence of fossils, also a

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-lavira: )

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

is this a question? wassup

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.