In an experimental investigation, the variable that the researcher changes or manipulates in order to see its effects is called the variable

Independent variable.

Explanation:

In the investigation there are two type of variables

1. Independent variables

2. Dependent variables

Independent variables are the variables which is independent and cam changes without affecting any other variables.But on the other hand dependent variables are the variable which depends on the independent variable.

 y=f(x)

Here y is the dependent variable and x is the independent variable.

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up