HEALTHY LAKES QUIZ!
Here's how it works. Start with this question, and when you choose the right answer, you'll move on to the next question.
(There are 10 questions to complete the quiz.)
HEALTHY LAKES QUIZ!Here's how it works. Start with this question, and when you choose the right answer, you'll move on to the next question.(There are 10 questions to complete the quiz.) |
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 Oxygen dissolved in water is essential to the health of a lake. Which of the organisms below plays an important role in returning this essential element to rivers and lakes?a) Fish c) Insects d) Crustaceans |
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