Give 2 examples of how the biosphere supports life

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Which law represents a balanced chemical equation?

What might explain the real-world results, show in the graph to the right, for one class of twenty students? check all that apply.