Question

A scientist was testing how fertilizer affects plant growth. So the scientist grew 100 plants with the fertilizer and measured them after 30 days. The scientist concluded that the the fertilizer helped the plants grow. What is a very important piece missing from the experiment that stops the scientist from being able to make this conclusion.

Answer 1

Explanation:

So the scientist grew 100 plants with the fertili… ... plants with the fertilizer and measured them after 30 days. ... concluded that the the fertilizer helped the plants grow.

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