Which correctly lists the three elements that geologists measure argon, nitrogen, and carbon-12
carbon-14, nitrogen, and carbon-12
nitrogen, potassium, and carbon-14
carbon-12, parassium, and argon

Environmental differences within ecosystems are generally caused by

If two parents who's blood types are both b produce a child that has blood type o, what can you say about the parent's genotybes? oa) one is ii ob) one is ibi oc) both are bi od) nothing, this is impossible

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