Some rivers have been dammed under the guise of flood control. what might be an unintended consequence of using this approach?

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

In which layer do organisms on earth love?

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes