Data Analysis Aquatic OrganismpH Range for Life
Clam4.5 - 5.0
Snail5.0 - 9.0
Bass5.5 - 9.0
Crayfish5.5 - 8.5
Mayfly5.5 - 9.0
Salamander6.0 - 8.0
Trout6.0 - 8.5
Perch6.5 - 8.5
Frog7.0 - 9.5

Based on the pH tolerance level data in the chart, an appropriate research topic that would lead to valid conclusions would be represented by ALL BUT one of the following research questions. That question is:
Select one:
a. How does a change in temperature affect the reproduction of crayfish?
b. Would a buffering solution increase the lifespan of frogs?
c. What is the effect of acid rain on animal life within a closed system?
d. What animal life forms seem most resistant to change in pH?