Which structure is unique to eukaryotic cells?
dna
cell membrane
ribosomes
nucleus

What is the inability of an individual or a society to achieve a minimum standard of living known as ?

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

What problem would a person most likely have if her kidney did not work correctly?