Which component is of the modern cell theory that was not part of the original

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

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

Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine