cell wall and central vacuole
observes
a naturalist observes the natural world
Observes and measure
A zoologist
Observes and measure
chemistry
A scientist who observes bones and earth
Astronomer.
The variable that a scientist observes to change while conducting an experiment is called the independent variable. This is the variable that is deliberately manipulated by the scientist to observe its effect on the dependent variable.
i believe you are asking about a light microscope.
Ethologist
Incomplete question.