Question

Lowest pH Tolerated for Survival
Organism Lowest pH For Survival
Trout 5.0
Bass 5.5
Perch 4.5
Frogs 4.0
Salamanders 5.0
Clams 6.0
Crayfish 5.5
Snails 6.0
Mayfly 5.0


What is the relationship between the pH of pond water and the survival rate of animal species living in the pond?
Responses
A The is no relationship between pH and surviving species.The is no relationship between pH and surviving species.
B As the pH decreases, the number of surviving species decreases.As the pH decreases, the number of surviving species decreases.
C As the pH decreases, the number of surviving species increases.As the pH decreases, the number of surviving species increases.
D As the pH increases, the number of surviving species decreases.

Answer 1

B — As the pH decreases, the number of surviving species decreases.

Explanation: Each species survives only down to its listed minimum pH. If pond pH drops below those thresholds, those species cannot survive, so fewer species remain as pH becomes more acidic.