A student wanted to study the effect of nitrogen fertilizer on plant growth, so

Question

A student wanted to study the effect of nitrogen fertilizer on plant growth, so she took two similar plants and set them on a windowsill for a two-week observation period. She watered each plant the same amount, but she gave one a small does of fertilizer with each watering. She collected the data by counting the total number of new leaves on each plant and measured the height of each plant in centimeters.
Which of the following is a significant flaw in this experimental set-up? Explain your answer.
a. There is no variable factor
b.There is no control
c.There is no repetion
d.measurable results cannot be expected
e.it will require too many days of data collection

Explanation / Answer

c.There is no repletion It has a variable factor;nitrogen added to one plant It has a control, the plant not given nitrogen fertilizer Measurable results are expected; the height of each plant Too many days shouldnt be a problem at all

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