Biology, 19.10.2019 09:00 zitterkoph

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight.

in the above experiment, what is the independent variable?

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Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to te...