A researcher hypothesizes that increased sunlight will cause increased plant gro

Question

A researcher hypothesizes that increased sunlight will cause increased plant growth. She takes 2 plants and places them in full sun, 2 are placed in a moderately sunny environment and 2 are placed in the dark. What is wrong with this experiment?

There is no positive control

There are too many independent variables

There is not enough replication

The hypothesis is not testable

There is no positive control

There are too many independent variables

There is not enough replication

The hypothesis is not testable

Explanation / Answer

According to the given hypothesis, increased sunlight will lead to increased plant growth. The plants placed in full sunlight serve as positive control while the one placed in dark serve as negative control. The independent variable is only sunlight among the three sets of the plants. So the correct answer is " hypothesis is not testable"

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