North Carolina Test of Biology. Form I RELEASED Fall 2009
A scientist performs an experiment to see if acids have an effect on the health of a particular type of plant. Three sets of plants were treated with acidic solutions of known pH while the control set was treated with a solution of neutral pH 7.
(pH 2) — 10 Dead
(pH 4) — 3 Dead
(pH 6) — 1 Dead
(pH 7) — 0 Dead
Which is the best conclusion for this experiment?
Acid has no effect on the health of this type of plant.
High acidity is helpful to this type of plant.
Low acidity is harmful to this type of plant.
High acidity is harmful to this type of plant.
Go to next page