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jenyasd209 [6]
3 years ago
5

The pink parts of the graph represent the pH range where some common freshwater organisms survive. If the pH of a lake were to s

tart at 3 and become more basic, at what pH would these freshwater organisms begin to die out?
Biology
2 answers:
NeTakaya3 years ago
6 0
Most organisms can tolerate a very narrow pH range close to neutral, i.e., around pH 7. It is likely that there would not be much life in the lake at pH 3. Once the pH increases to above 5.5 to 6, it is more likely that life would begin to survive. Once the pH rises to above around 9, the solution is starting to become basic, and once again, few organisms will survive. 
mars1129 [50]3 years ago
6 0

4.0 As the pH increases, the first type of fish, catfish, would begin to die off at a pH of 4.0. By the time the pH increased to 5.5, all organisms would be removed.

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Explanation:

Options for this question are:

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The theory that establishes the relationship between Archaea and Eukaryotic suggests the existence of a common ancestor, whose later evolution allowed an Archaea to join a protobacteria to form a eukaryotic cell, and hence their genetic relationship.

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