Differential gene expression is the result of different cells containing different

regulatory proteins
regulatory sequences
genes
nucleosomes

The answer is regulatory proteins

Explanation: Differential gene expression is the result of different cells containing different regulatory proteins.

Gene can be referred to as a portion or part of hereditary transferred from parent to offspring. Gene can also determine characteristics of the offspring.

Differential gene expression is the process that determines how cells grow.

Cell can be described as the smallest unit of life. It is called the building blocks of life and there are about trillions of cells in the human body.

Proteins are  macronutrients.

the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.