When conducting scientific research or experimentation, researchers carefully analyze and evaluate results to determine a valid conclusion. a scientist conducts an experiment to determine how different brands of fish food affect tropical fish growth. the scientist determines that all of their fish grow better when fed a specific brand of fish food. why would it be important to question the results of this experiment?
a.
it may be incorrect
b.
it may be based on opinions
c.
information can be biased
d.
all of the above

d.  all of the above

Explanation:

The results are the outcomes of the experimental procedures which are performed using suitable methodologies. The experimental results are subjected to analysis and evaluation by the researcher or other person reviewing the results. The results should not be incorrect, it must not be based on self generated opinions rather must be exactly what is obtain after the experiment, and it should not be baised so as to make the results in accordance with the hypothesis.

Thus all the given options are correct and these raise the important question over the result of the experiment.      

answer; both surfaces of the membrane are nonpermeable