Question #6406040Single Choice
Biology
Question
A researcher is interested in the effects of nitrate and phosphate on plant
growth and sets up an experiment in which groups of five plants are given
1, 2, and 3 grams of nitrate and 1, 2, and 3 grams of phosphate in all
combinations over a period of one month. The researcher measures plant
height and weight at the end of the experiment.
What is missing in this experimental design?
growth and sets up an experiment in which groups of five plants are given
1, 2, and 3 grams of nitrate and 1, 2, and 3 grams of phosphate in all
combinations over a period of one month. The researcher measures plant
height and weight at the end of the experiment.
What is missing in this experimental design?
Options
A
a constant
B
an independent variable
C
a dependent variable
D
a control
Answer & Analysis
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