The basic function of the cell membrane is to protect the cell from its surroundings. The cell membrane controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.
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information about earth’s outer atmosphere
B.
the temperature at the sun’s core
C.
the composition of the Martian surface
D.
the approximate age of the moon
B. two
C. three
D. as many as you want
One independentvariables can be tested in a controlled experiment. The correct option is A.
A person, place, thing, or phenomenon that you are attempting to quantify in any way is simply referred to as a variable in research.
The best approach to distinguish between a dependent and independent variable is to look at what the words themselves reveal about the variable you're using.
Only one variable at a time should be tested in an experiment. This guarantees that the experimental result is definitely caused by a single, recognisable component.
A controlled experiment in a scientific study is a test that the researcher actively modifies such that only onevariable is examined at a time.
Thus, the correct option is A.
For more details regarding variables, visit:
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hey there, i believe that your answer will be choice C!
A.
have a great day M8