Several experiments in the 1800s demonstrated that the tips of plants are responsible for detecting light, which causes the stem of the plant to elongate and bend towards the light.
Which of these phrases are accurate about the experimental design and its validity?
The experiment should be repeatable by the same researcher.
The experiment should be replicated by different researchers.
A control plant with no light or top light would likely show no bending.
All species of plants behave the same way.
The light levels should increase during the experiment as the plant grows.
Answers: 2
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