Acontrol variable is any element of an experiment that: is changed on purpose changes as a result of an action taken by the scientist is held constant throughout the experiment all of the above

is held constant throughout the experiment.

the control group is used as a foundation for your experiment so you know what changes what and how to manipulate the independent variable.

The correct answer is that it is held constant throughout the experiment.

Explanation:

A variable that is maintained constant all through the experiment is known as a control variable, and it is not the main concern in the outcome of the experiment. In an experiment, if there is any kind of change in a control variable it would lead to an error in the correlation of independent variable to the dependent variables, thus, affecting the results.

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explanation:

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.