3. Nucleic acids are made up of a sugar, a nitrogenous base, and a
group.
A. phosphate
B. cellulose
C. substrate

List two modern organisms that have pentameral symmetry

Why does the skin of your finger shrink when you wash clothes for a long time?

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