Which of the following substances is a strong acid? A. Sea Water. B. Pure water. C. Ammonia D. Battery acid

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 of the following statements about protists are true? a.they are typically found in moist environments. b.they are all unicellular. c.they have a nucleus. d.they are all multicellular.

All phases of matter may have a fixed mass