Question

An experiment was set up to test the hypothesis that all plants will grow faster in a "super soil" versus regular potting soil. Six identical plants were tested, three in the "super soil" and three in regular potting soil. All plants received the same amount of water, light and fertilizer. Which of the following items would improve the experiment?
add more types of plants


test one plant with no fertilizer


use different soils for each plant


expose all six plants to green light

Answer 1

Answer:

add more types of plants

Explanation:are you kidding me i’m doing this stuff and i’m in 7th grade