Is hemoglobin built by carbohydrates, lipids, proteins or nucleic acids?

As a small change in a person's dna can cause a genetic disorder

Apart of an ecosystem that can restrict the growth of a population is referred to 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