yes, he discovered electrons.
Usually a planaria regeneration experiment involves cutting the planaria into different parts. The head can be separated from the tail or the planaria can be cut lengthwise, etc. After cutting the planaria, it will be observed for few days noting how the organism regenerate its lost body parts. Read more on planaria regeneration on t he link provided below.
a control and a variable
The controlled parts of a controlled experiment are the variables that are kept constant or unchanged throughout the course of the experiment. These include factors such as temperature, time, lighting, and any other conditions that could potentially affect the outcome of the experiment. Controlling these variables helps to ensure that any changes observed in the experiment are a result of the manipulated variable being tested.
The parts of an experiment that stay the same.
hypothesis,procedure,data
i think that independent variable
observation, hypothsis, experimentation. and conclustion
In an experiment, the parts that are kept the same are known as constants or controlled variables. These are the factors that are intentionally kept unchanged throughout the experiment to ensure that any observed changes in the results are caused by the independent variable being tested.
opposite sides are congruent corresponding parts of congruent triangles are congruent(apex)
Control
The main parts of a controlled experiment are the dependent variable and the independent variable. The dependent variable is what is measured in the experiment. The independent variable is the variable that is varied or manipulated by the researcher. The independent variable is the presumed cause, whereas the dependent variable is the presumed effect.
environmental