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29 April, 15:56

A researcher is setting up an experiment to compare the rates of movement of individuals from different light-sensitive single-celled organism species toward a light source. Which is the constant in this experiment?

A

Intensity of light source

B

Organism species

C

Rate of movement

D

Direction of movement

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Answers (1)
  1. 29 April, 17:11
    0
    B

    Because changing the species will skew the results
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