Question

Which observation would most likely be made before an experiment?

Answer 1

Measuring plant growth in response to different fertilizer.

Explanation:

• Before a study on the effect of fertilizer on different plant growth, an observation is needed to be made before the experiment.
• This is done to rule out the harmful effects of fertilizer on  plants. Such study is known as retrospective study.
• In prospective study the observation is done after an experiment.
• The experiment on pisum sativum is also an example of such types of study.

To know:

What is fertilizer? name any two fertilizers. state two harmful effects caused by the excessive use of fertilizer

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What are fertilizer???

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