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NCDPI

North Carolina Test of Biology. Form I RELEASED Fall 2009

39.

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?

RELEASED

A

Acid has no effect on the health of this type of plant.

B

High acidity is helpful to this type of plant.

C

Low acidity is harmful to this type of plant.

D

High acidity is harmful to this type of plant.

Page 19

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