Lungs and skin are also excretory organ

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

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions

Where can dna be found in a prokaryotic cell