A group of botanists would like to study the effects of fertilizer on plant growth. The botanist have two bushes of roses. Both groups of bushes are given the same amount of water, sunlight and nutrients. Then the botanist gave one of the rose bushes' fertilizer. The other group of roses are given no
fertilizer. What is considered the experimental group?
The amount of water each bush receives
The group of roses receiving the fertilizer
The group of roses that do not receive the fertilizer
The height of the rose bushes after two weeks