B. I got the answer off of quizlet lol it helps a lot.
Answer:
As the pH rises, the concentration (toxicity) of the ammonia also increases. When the pH level increases above 9, most of the ammonium in the water is converted into toxic ammonia (NH3), which can kill fish. ... The Nitrobacter bacterium feeds on the nitrites in the water and converts them into nitrate (NO3).
Explanation:
test the ph balance.
Answer: If you import more than you export, more money is leaving the country than is coming in through export sales. On the other hand, the more a country exports, the more domestic economic activity is occurring. More exports means more production, jobs and revenue.
Explanation: If a country exports a greater value than it imports, it has a trade surplus or positive trade balance, and conversely, if a country imports a greater value than it exports, it has a trade deficit or negative trade balance.
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It is the change in pattern of human interactions and social structure
