Question

I am in k12 biology help asp if you know this

Parts of a Scientific Process
(Score for Question 2: ___ of 5 points)
2. What was the role of the water test tube in each phase?
Answer:

Answer 1

The water was used for comparison or control

Step-by-step explanation:

in water we know there are no,macro molecules,just water iodine is pretty dark,but elwhen you put it in the solution it will change. Still stuck.