LIFE SCIENCE

Detailed explanation-1: -The field of molecular biology is focused especially on nucleic acids (e.g., DNA and RNA) and proteins-macromolecules that are essential to life processes-and how these molecules interact and behave within cells.

Detailed explanation-2: -Molecular biology. DNA and the genetic code reflect the shared ancestry of life. DNA comparisons can show how related species are.

Detailed explanation-3: -Molecular diagnostics, also called molecular pathology, involves taking DNA or RNA, the unique genetic code found in our cells, and analyzing the sequences for red flags that can pinpoint the potential emergence of a specific disease. The field has expanded rapidly in recent years.

Detailed explanation-4: -Scientists can estimate these relationships by studying the organisms’ DNA sequences. As the organisms evolve and diverge, their DNA sequences accumulate mutations. Scientists compare these mutations using sequence alignments to reconstruct evolutionary history.