Explain how the same features of viral replication that introduce genetic variation into a host organism can be used by science and medicine for gene therapy.

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

The rapid decomposition of organic matter produces evidence which supports: the slow accumulation of coal deposits long ages of the earth rapid burial of vast amounts of vegetation biblical account of noah's flood

What pattern of migration do whales follow?