Why do eukaryotic cells need to be able to turn genes on and off as necessary?

The reason why eukaryotic cells are in need of turning on and off their genes when necessary because of the reason that they may feel stress because they are under stress as they have the responsibility of acting immediately when they needed and by that, they need to be turned on or off in means of adapting to the stress that they experience.

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.