tropism
The reaction to something in an environment is called a stimulus.
A plant cell is best in a hypotonic environment
In the chemical installations of the plant.
reflex
An endothermic reaction absorbs energy, making its environment cooler. Ab exothermic reaction releases energy, making its environment warmer.
It depends upon the type of the plant.
What a plant or animal does after receiving a stimulus is an example of a reaction. If the stimulus is unexpected, the reaction is an involuntary one.
Environment is the surroundings where an plant or an animal exists.
photosynthesis
If your reaction to events or things in the environment is referred to as your emotional response or emotional reaction. This can include feelings of joy, sadness, anger, fear, or surprise based on the situation.
paper burning.
A stimulus.