Match each of the following key events in the history of Earth and life with its approximate date, in million of years ago (mya). Options:4600mya,1000mya,4000mya,200mya,6mya,300mya,2500mya,635mya,130mya,150mya,2000mya,500mya,400mya,541mya, 0.15mya   First Dinosaurs and mammals First Cell First multicellular organism First amphibians  Increase in atmospheric oxygen  First Reptiles First hominis Cambrian explosion First birds Homo sapiens (modern humans) First fish Formation of Earth  First Animals  Rise of flowering plants

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