Fill in the missing letters in the paragraph.
The number of underlines shows how many letters you need to fill in. You may answer with the full word or only the missing part.

Living organisms share largely similar genetic material; ho _ _ _ _ _ , cells differ dramatically in structure and function. This div_ _ _ _ _ _ arises not from changes in DNA seq  _ _ _ _ _ themselves, but from the regulation of gene expression. Certain genes are activated or sup _ _ _ _ _ _ _  depending on cellular context, developmental stage, and environmental conditions. Recent research has emphasized the role of epigenetic mechanisms, which modify how genes are expressed without altering the underlying DNA code. Chemical tags such as methyl groups can bind to DNA or associated proteins, thereby inh _ _ _ _ _ _ _ transcription. These modifications may persist through cell division, allowing cells to maintain specialized functions over time. As a result, gene regulation is now understood as a dyn _ _ _ _  process shaped by both genetic instructions and envi _ _ _ _ _ _ _ _ _ influence.