A student conducted an experiment with two rose plants to determine if a liquid formula for fertilizer produced greater growth than a dry formula. After testing each fertilizer on two different plants for one month, his data led to the conclusion that the liquid formula was a better promoter of plant growth. When he described his conclusion to his teacher, she told him he needed to conduct additional trials. The teacher most likely asked for additional trials because

it was necessary to see data from more plants before the conclusion could be accepted.

Explanation:

After describing his conclusion the teacher most likely asked him to conduct more trials because, it was very important and necessary to see data from more plants before the conclusion could be accepted.

The student needed to carryout more extensive tests on more plants then record the data’s to come to a conclusion and not the one he carried out on just two plants.

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.