Aquatic animals have different levels of tolerance to pH changes in water. For example, a wood frog will die if the pH of water falls below 4,
while a clam will die if the pH of water falls below 6. What can you conclude about the acidity of water in a river if:
a. both wood frogs and clams survive;
b. only the wood frogs survive;
c. both the wood frogs and clams do not survive?
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I don't know
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