The deepest muscle of the abdominal wall is the

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

What did hunter gathers do to alter the environment?

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